up n_m

node_modules/micromark-extension-gfm-footnote/dev/index.d.ts

@@ -0,0 +1,34 @@
+export {gfmFootnote} from './lib/syntax.js'
+export {
+  gfmFootnoteHtml,
+  defaultBackLabel,
+  type BackLabelTemplate,
+  type Options as HtmlOptions
+} from './lib/html.js'
+
+declare module 'micromark-util-types' {
+  interface TokenTypeMap {
+    gfmFootnoteCall: 'gfmFootnoteCall'
+    gfmFootnoteCallLabelMarker: 'gfmFootnoteCallLabelMarker'
+    gfmFootnoteCallMarker: 'gfmFootnoteCallMarker'
+    gfmFootnoteCallString: 'gfmFootnoteCallString'
+    gfmFootnoteDefinition: 'gfmFootnoteDefinition'
+    gfmFootnoteDefinitionIndent: 'gfmFootnoteDefinitionIndent'
+    gfmFootnoteDefinitionLabel: 'gfmFootnoteDefinitionLabel'
+    gfmFootnoteDefinitionLabelMarker: 'gfmFootnoteDefinitionLabelMarker'
+    gfmFootnoteDefinitionLabelString: 'gfmFootnoteDefinitionLabelString'
+    gfmFootnoteDefinitionMarker: 'gfmFootnoteDefinitionMarker'
+    gfmFootnoteDefinitionWhitespace: 'gfmFootnoteDefinitionWhitespace'
+  }
+
+  interface ParseContext {
+    gfmFootnotes?: string[]
+  }
+
+  interface CompileData {
+    gfmFootnoteDefinitions?: Record<string, string>
+    gfmFootnoteDefinitionStack?: string[]
+    gfmFootnoteCallCounts?: Record<string, number>
+    gfmFootnoteCallOrder?: string[]
+  }
+}

node_modules/micromark-extension-gfm-footnote/dev/index.js

@@ -0,0 +1,3 @@
+// Note: types are exported from `dev/index.d.ts`.
+export {gfmFootnote} from './lib/syntax.js'
+export {gfmFootnoteHtml, defaultBackLabel} from './lib/html.js'

node_modules/micromark-extension-gfm-footnote/dev/lib/html.d.ts

@@ -0,0 +1,142 @@
+/**
+ * Generate the default label that GitHub uses on backreferences.
+ *
+ * @param {number} referenceIndex
+ *   Index of the definition in the order that they are first referenced,
+ *   0-indexed.
+ * @param {number} rereferenceIndex
+ *   Index of calls to the same definition, 0-indexed.
+ * @returns {string}
+ *   Default label.
+ */
+export function defaultBackLabel(
+  referenceIndex: number,
+  rereferenceIndex: number
+): string
+/**
+ * Create an extension for `micromark` to support GFM footnotes when
+ * serializing to HTML.
+ *
+ * @param {Options | null | undefined} [options={}]
+ *   Configuration (optional).
+ * @returns {HtmlExtension}
+ *   Extension for `micromark` that can be passed in `htmlExtensions` to
+ *   support GFM footnotes when serializing to HTML.
+ */
+export function gfmFootnoteHtml(
+  options?: Options | null | undefined
+): HtmlExtension
+export type HtmlExtension = import('micromark-util-types').HtmlExtension
+/**
+ * Generate a back label dynamically.
+ *
+ * For the following markdown:
+ *
+ * ```markdown
+ * Alpha[^micromark], bravo[^micromark], and charlie[^remark].
+ *
+ * [^remark]: things about remark
+ * [^micromark]: things about micromark
+ * ```
+ *
+ * This function will be called with:
+ *
+ * * `0` and `0` for the backreference from `things about micromark` to
+ *  `alpha`, as it is the first used definition, and the first call to it
+ * * `0` and `1` for the backreference from `things about micromark` to
+ *  `bravo`, as it is the first used definition, and the second call to it
+ * * `1` and `0` for the backreference from `things about remark` to
+ *  `charlie`, as it is the second used definition
+ */
+export type BackLabelTemplate = (
+  referenceIndex: number,
+  rereferenceIndex: number
+) => string
+/**
+ * Configuration.
+ */
+export type Options = {
+  /**
+   * Prefix to use before the `id` attribute on footnotes to prevent them from
+   * *clobbering* (default: `'user-content-'`).
+   *
+   * Pass `''` for trusted markdown and when you are careful with
+   * polyfilling.
+   * You could pass a different prefix.
+   *
+   * DOM clobbering is this:
+   *
+   * ```html
+   * <p id="x"></p>
+   * <script>alert(x) // `x` now refers to the `p#x` DOM element</script>
+   * ```
+   *
+   * The above example shows that elements are made available by browsers, by
+   * their ID, on the `window` object.
+   * This is a security risk because you might be expecting some other variable
+   * at that place.
+   * It can also break polyfills.
+   * Using a prefix solves these problems.
+   */
+  clobberPrefix?: string | null | undefined
+  /**
+   * Textual label to use for the footnotes section (default: `'Footnotes'`).
+   *
+   * Change it when the markdown is not in English.
+   *
+   * This label is typically hidden visually (assuming a `sr-only` CSS class
+   * is defined that does that) and so affects screen readers only.
+   * If you do have such a class, but want to show this section to everyone,
+   * pass different attributes with the `labelAttributes` option.
+   */
+  label?: string | null | undefined
+  /**
+   * Attributes to use on the footnote label (default: `'class="sr-only"'`).
+   *
+   * Change it to show the label and add other attributes.
+   *
+   * This label is typically hidden visually (assuming an `sr-only` CSS class
+   * is defined that does that) and so affects screen readers only.
+   * If you do have such a class, but want to show this section to everyone,
+   * pass an empty string.
+   * You can also add different attributes.
+   *
+   * > 👉 **Note**: `id="footnote-label"` is always added, because footnote
+   * > calls use it with `aria-describedby` to provide an accessible label.
+   */
+  labelAttributes?: string | null | undefined
+  /**
+   * HTML tag name to use for the footnote label element (default: `'h2'`).
+   *
+   * Change it to match your document structure.
+   *
+   * This label is typically hidden visually (assuming a `sr-only` CSS class
+   * is defined that does that) and so affects screen readers only.
+   * If you do have such a class, but want to show this section to everyone,
+   * pass different attributes with the `labelAttributes` option.
+   */
+  labelTagName?: string | null | undefined
+  /**
+   * Textual label to describe the backreference back to references (default:
+   * `defaultBackLabel`).
+   *
+   * The default value is:
+   *
+   * ```js
+   * function defaultBackLabel(referenceIndex, rereferenceIndex) {
+   * return (
+   * 'Back to reference ' +
+   * (referenceIndex + 1) +
+   * (rereferenceIndex > 1 ? '-' + rereferenceIndex : '')
+   * )
+   * }
+   * ```
+   *
+   * Change it when the markdown is not in English.
+   *
+   * This label is used in the `aria-label` attribute on each backreference
+   * (the `↩` links).
+   * It affects users of assistive technology.
+   */
+  backLabel?: BackLabelTemplate | string | null | undefined
+}

node_modules/micromark-extension-gfm-footnote/dev/lib/html.js

@@ -0,0 +1,333 @@
+/**
+ * @typedef {import('micromark-util-types').HtmlExtension} HtmlExtension
+ */
+
+/**
+ * @callback BackLabelTemplate
+ *   Generate a back label dynamically.
+ *
+ *   For the following markdown:
+ *
+ *   ```markdown
+ *   Alpha[^micromark], bravo[^micromark], and charlie[^remark].
+ *
+ *   [^remark]: things about remark
+ *   [^micromark]: things about micromark
+ *   ```
+ *
+ *   This function will be called with:
+ *
+ *   * `0` and `0` for the backreference from `things about micromark` to
+ *      `alpha`, as it is the first used definition, and the first call to it
+ *   * `0` and `1` for the backreference from `things about micromark` to
+ *      `bravo`, as it is the first used definition, and the second call to it
+ *   * `1` and `0` for the backreference from `things about remark` to
+ *      `charlie`, as it is the second used definition
+ * @param {number} referenceIndex
+ *   Index of the definition in the order that they are first referenced,
+ *   0-indexed.
+ * @param {number} rereferenceIndex
+ *   Index of calls to the same definition, 0-indexed.
+ * @returns {string}
+ *   Back label to use when linking back from definitions to their reference.
+ */
+
+/**
+ * @typedef Options
+ *   Configuration.
+ * @property {string | null | undefined} [clobberPrefix='user-content-']
+ *   Prefix to use before the `id` attribute on footnotes to prevent them from
+ *   *clobbering* (default: `'user-content-'`).
+ *
+ *   Pass `''` for trusted markdown and when you are careful with
+ *   polyfilling.
+ *   You could pass a different prefix.
+ *
+ *   DOM clobbering is this:
+ *
+ *   ```html
+ *   <p id="x"></p>
+ *   <script>alert(x) // `x` now refers to the `p#x` DOM element</script>
+ *   ```
+ *
+ *   The above example shows that elements are made available by browsers, by
+ *   their ID, on the `window` object.
+ *   This is a security risk because you might be expecting some other variable
+ *   at that place.
+ *   It can also break polyfills.
+ *   Using a prefix solves these problems.
+ * @property {string | null | undefined} [label='Footnotes']
+ *   Textual label to use for the footnotes section (default: `'Footnotes'`).
+ *
+ *   Change it when the markdown is not in English.
+ *
+ *   This label is typically hidden visually (assuming a `sr-only` CSS class
+ *   is defined that does that) and so affects screen readers only.
+ *   If you do have such a class, but want to show this section to everyone,
+ *   pass different attributes with the `labelAttributes` option.
+ * @property {string | null | undefined} [labelAttributes='class="sr-only"']
+ *   Attributes to use on the footnote label (default: `'class="sr-only"'`).
+ *
+ *   Change it to show the label and add other attributes.
+ *
+ *   This label is typically hidden visually (assuming an `sr-only` CSS class
+ *   is defined that does that) and so affects screen readers only.
+ *   If you do have such a class, but want to show this section to everyone,
+ *   pass an empty string.
+ *   You can also add different attributes.
+ *
+ *   > 👉 **Note**: `id="footnote-label"` is always added, because footnote
+ *   > calls use it with `aria-describedby` to provide an accessible label.
+ * @property {string | null | undefined} [labelTagName='h2']
+ *   HTML tag name to use for the footnote label element (default: `'h2'`).
+ *
+ *   Change it to match your document structure.
+ *
+ *   This label is typically hidden visually (assuming a `sr-only` CSS class
+ *   is defined that does that) and so affects screen readers only.
+ *   If you do have such a class, but want to show this section to everyone,
+ *   pass different attributes with the `labelAttributes` option.
+ * @property {BackLabelTemplate | string | null | undefined} [backLabel]
+ *   Textual label to describe the backreference back to references (default:
+ *   `defaultBackLabel`).
+ *
+ *   The default value is:
+ *
+ *   ```js
+ *   function defaultBackLabel(referenceIndex, rereferenceIndex) {
+ *    return (
+ *      'Back to reference ' +
+ *      (referenceIndex + 1) +
+ *      (rereferenceIndex > 1 ? '-' + rereferenceIndex : '')
+ *    )
+ *  }
+ *   ```
+ *
+ *   Change it when the markdown is not in English.
+ *
+ *   This label is used in the `aria-label` attribute on each backreference
+ *   (the `↩` links).
+ *   It affects users of assistive technology.
+ */
+
+import {ok as assert} from 'devlop'
+import {normalizeIdentifier} from 'micromark-util-normalize-identifier'
+import {sanitizeUri} from 'micromark-util-sanitize-uri'
+
+const own = {}.hasOwnProperty
+
+/** @type {Options} */
+const emptyOptions = {}
+
+/**
+ * Generate the default label that GitHub uses on backreferences.
+ *
+ * @param {number} referenceIndex
+ *   Index of the definition in the order that they are first referenced,
+ *   0-indexed.
+ * @param {number} rereferenceIndex
+ *   Index of calls to the same definition, 0-indexed.
+ * @returns {string}
+ *   Default label.
+ */
+export function defaultBackLabel(referenceIndex, rereferenceIndex) {
+  return (
+    'Back to reference ' +
+    (referenceIndex + 1) +
+    (rereferenceIndex > 1 ? '-' + rereferenceIndex : '')
+  )
+}
+
+/**
+ * Create an extension for `micromark` to support GFM footnotes when
+ * serializing to HTML.
+ *
+ * @param {Options | null | undefined} [options={}]
+ *   Configuration (optional).
+ * @returns {HtmlExtension}
+ *   Extension for `micromark` that can be passed in `htmlExtensions` to
+ *   support GFM footnotes when serializing to HTML.
+ */
+export function gfmFootnoteHtml(options) {
+  const config = options || emptyOptions
+  const label = config.label || 'Footnotes'
+  const labelTagName = config.labelTagName || 'h2'
+  const labelAttributes =
+    config.labelAttributes === null || config.labelAttributes === undefined
+      ? 'class="sr-only"'
+      : config.labelAttributes
+  const backLabel = config.backLabel || defaultBackLabel
+  const clobberPrefix =
+    config.clobberPrefix === null || config.clobberPrefix === undefined
+      ? 'user-content-'
+      : config.clobberPrefix
+  return {
+    enter: {
+      gfmFootnoteDefinition() {
+        const stack = this.getData('tightStack')
+        stack.push(false)
+      },
+      gfmFootnoteDefinitionLabelString() {
+        this.buffer()
+      },
+      gfmFootnoteCallString() {
+        this.buffer()
+      }
+    },
+    exit: {
+      gfmFootnoteDefinition() {
+        let definitions = this.getData('gfmFootnoteDefinitions')
+        const footnoteStack = this.getData('gfmFootnoteDefinitionStack')
+        assert(footnoteStack, 'expected `footnoteStack`')
+        const tightStack = this.getData('tightStack')
+        const current = footnoteStack.pop()
+        const value = this.resume()
+
+        assert(current, 'expected to be in a footnote')
+
+        if (!definitions) {
+          this.setData('gfmFootnoteDefinitions', (definitions = {}))
+        }
+
+        if (!own.call(definitions, current)) definitions[current] = value
+
+        tightStack.pop()
+        this.setData('slurpOneLineEnding', true)
+        // “Hack” to prevent a line ending from showing up if we’re in a definition in
+        // an empty list item.
+        this.setData('lastWasTag')
+      },
+      gfmFootnoteDefinitionLabelString(token) {
+        let footnoteStack = this.getData('gfmFootnoteDefinitionStack')
+
+        if (!footnoteStack) {
+          this.setData('gfmFootnoteDefinitionStack', (footnoteStack = []))
+        }
+
+        footnoteStack.push(normalizeIdentifier(this.sliceSerialize(token)))
+        this.resume() // Drop the label.
+        this.buffer() // Get ready for a value.
+      },
+      gfmFootnoteCallString(token) {
+        let calls = this.getData('gfmFootnoteCallOrder')
+        let counts = this.getData('gfmFootnoteCallCounts')
+        const id = normalizeIdentifier(this.sliceSerialize(token))
+        /** @type {number} */
+        let counter
+
+        this.resume()
+
+        if (!calls) this.setData('gfmFootnoteCallOrder', (calls = []))
+        if (!counts) this.setData('gfmFootnoteCallCounts', (counts = {}))
+
+        const index = calls.indexOf(id)
+        const safeId = sanitizeUri(id.toLowerCase())
+
+        if (index === -1) {
+          calls.push(id)
+          counts[id] = 1
+          counter = calls.length
+        } else {
+          counts[id]++
+          counter = index + 1
+        }
+
+        const reuseCounter = counts[id]
+
+        this.tag(
+          '<sup><a href="#' +
+            clobberPrefix +
+            'fn-' +
+            safeId +
+            '" id="' +
+            clobberPrefix +
+            'fnref-' +
+            safeId +
+            (reuseCounter > 1 ? '-' + reuseCounter : '') +
+            '" data-footnote-ref="" aria-describedby="footnote-label">' +
+            String(counter) +
+            '</a></sup>'
+        )
+      },
+      null() {
+        const calls = this.getData('gfmFootnoteCallOrder') || []
+        const counts = this.getData('gfmFootnoteCallCounts') || {}
+        const definitions = this.getData('gfmFootnoteDefinitions') || {}
+        let index = -1
+
+        if (calls.length > 0) {
+          this.lineEndingIfNeeded()
+          this.tag(
+            '<section data-footnotes="" class="footnotes"><' +
+              labelTagName +
+              ' id="footnote-label"' +
+              (labelAttributes ? ' ' + labelAttributes : '') +
+              '>'
+          )
+          this.raw(this.encode(label))
+          this.tag('</' + labelTagName + '>')
+          this.lineEndingIfNeeded()
+          this.tag('<ol>')
+        }
+
+        while (++index < calls.length) {
+          // Called definitions are always defined.
+          const id = calls[index]
+          const safeId = sanitizeUri(id.toLowerCase())
+          let referenceIndex = 0
+          /** @type {Array<string>} */
+          const references = []
+
+          while (++referenceIndex <= counts[id]) {
+            references.push(
+              '<a href="#' +
+                clobberPrefix +
+                'fnref-' +
+                safeId +
+                (referenceIndex > 1 ? '-' + referenceIndex : '') +
+                '" data-footnote-backref="" aria-label="' +
+                this.encode(
+                  typeof backLabel === 'string'
+                    ? backLabel
+                    : backLabel(index, referenceIndex)
+                ) +
+                '" class="data-footnote-backref">↩' +
+                (referenceIndex > 1
+                  ? '<sup>' + referenceIndex + '</sup>'
+                  : '') +
+                '</a>'
+            )
+          }
+
+          const reference = references.join(' ')
+          let injected = false
+
+          this.lineEndingIfNeeded()
+          this.tag('<li id="' + clobberPrefix + 'fn-' + safeId + '">')
+          this.lineEndingIfNeeded()
+          this.tag(
+            definitions[id].replace(/<\/p>(?:\r?\n|\r)?$/, function ($0) {
+              injected = true
+              return ' ' + reference + $0
+            })
+          )
+
+          if (!injected) {
+            this.lineEndingIfNeeded()
+            this.tag(reference)
+          }
+
+          this.lineEndingIfNeeded()
+          this.tag('</li>')
+        }
+
+        if (calls.length > 0) {
+          this.lineEndingIfNeeded()
+          this.tag('</ol>')
+          this.lineEndingIfNeeded()
+          this.tag('</section>')
+        }
+      }
+    }
+  }
+}

node_modules/micromark-extension-gfm-footnote/dev/lib/syntax.d.ts

@@ -0,0 +1,16 @@
+/**
+ * Create an extension for `micromark` to enable GFM footnote syntax.
+ *
+ * @returns {Extension}
+ *   Extension for `micromark` that can be passed in `extensions` to
+ *   enable GFM footnote syntax.
+ */
+export function gfmFootnote(): Extension
+export type Event = import('micromark-util-types').Event
+export type Exiter = import('micromark-util-types').Exiter
+export type Extension = import('micromark-util-types').Extension
+export type Resolver = import('micromark-util-types').Resolver
+export type State = import('micromark-util-types').State
+export type Token = import('micromark-util-types').Token
+export type TokenizeContext = import('micromark-util-types').TokenizeContext
+export type Tokenizer = import('micromark-util-types').Tokenizer

node_modules/micromark-extension-gfm-footnote/dev/lib/syntax.js

@@ -0,0 +1,560 @@
+/**
+ * @typedef {import('micromark-util-types').Event} Event
+ * @typedef {import('micromark-util-types').Exiter} Exiter
+ * @typedef {import('micromark-util-types').Extension} Extension
+ * @typedef {import('micromark-util-types').Resolver} Resolver
+ * @typedef {import('micromark-util-types').State} State
+ * @typedef {import('micromark-util-types').Token} Token
+ * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext
+ * @typedef {import('micromark-util-types').Tokenizer} Tokenizer
+ */
+
+import {ok as assert} from 'devlop'
+import {blankLine} from 'micromark-core-commonmark'
+import {factorySpace} from 'micromark-factory-space'
+import {markdownLineEndingOrSpace} from 'micromark-util-character'
+import {normalizeIdentifier} from 'micromark-util-normalize-identifier'
+import {codes, constants, types} from 'micromark-util-symbol'
+
+const indent = {tokenize: tokenizeIndent, partial: true}
+
+// To do: micromark should support a `_hiddenGfmFootnoteSupport`, which only
+// affects label start (image).
+// That will let us drop `tokenizePotentialGfmFootnote*`.
+// It currently has a `_hiddenFootnoteSupport`, which affects that and more.
+// That can be removed when `micromark-extension-footnote` is archived.
+
+/**
+ * Create an extension for `micromark` to enable GFM footnote syntax.
+ *
+ * @returns {Extension}
+ *   Extension for `micromark` that can be passed in `extensions` to
+ *   enable GFM footnote syntax.
+ */
+export function gfmFootnote() {
+  /** @type {Extension} */
+  return {
+    document: {
+      [codes.leftSquareBracket]: {
+        tokenize: tokenizeDefinitionStart,
+        continuation: {tokenize: tokenizeDefinitionContinuation},
+        exit: gfmFootnoteDefinitionEnd
+      }
+    },
+    text: {
+      [codes.leftSquareBracket]: {tokenize: tokenizeGfmFootnoteCall},
+      [codes.rightSquareBracket]: {
+        add: 'after',
+        tokenize: tokenizePotentialGfmFootnoteCall,
+        resolveTo: resolveToPotentialGfmFootnoteCall
+      }
+    }
+  }
+}
+
+// To do: remove after micromark update.
+/**
+ * @this {TokenizeContext}
+ * @type {Tokenizer}
+ */
+function tokenizePotentialGfmFootnoteCall(effects, ok, nok) {
+  const self = this
+  let index = self.events.length
+  const defined = self.parser.gfmFootnotes || (self.parser.gfmFootnotes = [])
+  /** @type {Token} */
+  let labelStart
+
+  // Find an opening.
+  while (index--) {
+    const token = self.events[index][1]
+
+    if (token.type === types.labelImage) {
+      labelStart = token
+      break
+    }
+
+    // Exit if we’ve walked far enough.
+    if (
+      token.type === 'gfmFootnoteCall' ||
+      token.type === types.labelLink ||
+      token.type === types.label ||
+      token.type === types.image ||
+      token.type === types.link
+    ) {
+      break
+    }
+  }
+
+  return start
+
+  /**
+   * @type {State}
+   */
+  function start(code) {
+    assert(code === codes.rightSquareBracket, 'expected `]`')
+
+    if (!labelStart || !labelStart._balanced) {
+      return nok(code)
+    }
+
+    const id = normalizeIdentifier(
+      self.sliceSerialize({start: labelStart.end, end: self.now()})
+    )
+
+    if (id.codePointAt(0) !== codes.caret || !defined.includes(id.slice(1))) {
+      return nok(code)
+    }
+
+    effects.enter('gfmFootnoteCallLabelMarker')
+    effects.consume(code)
+    effects.exit('gfmFootnoteCallLabelMarker')
+    return ok(code)
+  }
+}
+
+// To do: remove after micromark update.
+/** @type {Resolver} */
+function resolveToPotentialGfmFootnoteCall(events, context) {
+  let index = events.length
+  /** @type {Token | undefined} */
+  let labelStart
+
+  // Find an opening.
+  while (index--) {
+    if (
+      events[index][1].type === types.labelImage &&
+      events[index][0] === 'enter'
+    ) {
+      labelStart = events[index][1]
+      break
+    }
+  }
+
+  assert(labelStart, 'expected `labelStart` to resolve')
+
+  // Change the `labelImageMarker` to a `data`.
+  events[index + 1][1].type = types.data
+  events[index + 3][1].type = 'gfmFootnoteCallLabelMarker'
+
+  // The whole (without `!`):
+  /** @type {Token} */
+  const call = {
+    type: 'gfmFootnoteCall',
+    start: Object.assign({}, events[index + 3][1].start),
+    end: Object.assign({}, events[events.length - 1][1].end)
+  }
+  // The `^` marker
+  /** @type {Token} */
+  const marker = {
+    type: 'gfmFootnoteCallMarker',
+    start: Object.assign({}, events[index + 3][1].end),
+    end: Object.assign({}, events[index + 3][1].end)
+  }
+  // Increment the end 1 character.
+  marker.end.column++
+  marker.end.offset++
+  marker.end._bufferIndex++
+  /** @type {Token} */
+  const string = {
+    type: 'gfmFootnoteCallString',
+    start: Object.assign({}, marker.end),
+    end: Object.assign({}, events[events.length - 1][1].start)
+  }
+  /** @type {Token} */
+  const chunk = {
+    type: types.chunkString,
+    contentType: 'string',
+    start: Object.assign({}, string.start),
+    end: Object.assign({}, string.end)
+  }
+
+  /** @type {Array<Event>} */
+  const replacement = [
+    // Take the `labelImageMarker` (now `data`, the `!`)
+    events[index + 1],
+    events[index + 2],
+    ['enter', call, context],
+    // The `[`
+    events[index + 3],
+    events[index + 4],
+    // The `^`.
+    ['enter', marker, context],
+    ['exit', marker, context],
+    // Everything in between.
+    ['enter', string, context],
+    ['enter', chunk, context],
+    ['exit', chunk, context],
+    ['exit', string, context],
+    // The ending (`]`, properly parsed and labelled).
+    events[events.length - 2],
+    events[events.length - 1],
+    ['exit', call, context]
+  ]
+
+  events.splice(index, events.length - index + 1, ...replacement)
+
+  return events
+}
+
+/**
+ * @this {TokenizeContext}
+ * @type {Tokenizer}
+ */
+function tokenizeGfmFootnoteCall(effects, ok, nok) {
+  const self = this
+  const defined = self.parser.gfmFootnotes || (self.parser.gfmFootnotes = [])
+  let size = 0
+  /** @type {boolean} */
+  let data
+
+  // Note: the implementation of `markdown-rs` is different, because it houses
+  // core *and* extensions in one project.
+  // Therefore, it can include footnote logic inside `label-end`.
+  // We can’t do that, but luckily, we can parse footnotes in a simpler way than
+  // needed for labels.
+  return start
+
+  /**
+   * Start of footnote label.
+   *
+   * ```markdown
+   * > | a [^b] c
+   *       ^
+   * ```
+   *
+   * @type {State}
+   */
+  function start(code) {
+    assert(code === codes.leftSquareBracket, 'expected `[`')
+    effects.enter('gfmFootnoteCall')
+    effects.enter('gfmFootnoteCallLabelMarker')
+    effects.consume(code)
+    effects.exit('gfmFootnoteCallLabelMarker')
+    return callStart
+  }
+
+  /**
+   * After `[`, at `^`.
+   *
+   * ```markdown
+   * > | a [^b] c
+   *        ^
+   * ```
+   *
+   * @type {State}
+   */
+  function callStart(code) {
+    if (code !== codes.caret) return nok(code)
+
+    effects.enter('gfmFootnoteCallMarker')
+    effects.consume(code)
+    effects.exit('gfmFootnoteCallMarker')
+    effects.enter('gfmFootnoteCallString')
+    effects.enter('chunkString').contentType = 'string'
+    return callData
+  }
+
+  /**
+   * In label.
+   *
+   * ```markdown
+   * > | a [^b] c
+   *         ^
+   * ```
+   *
+   * @type {State}
+   */
+  function callData(code) {
+    if (
+      // Too long.
+      size > constants.linkReferenceSizeMax ||
+      // Closing brace with nothing.
+      (code === codes.rightSquareBracket && !data) ||
+      // Space or tab is not supported by GFM for some reason.
+      // `\n` and `[` not being supported makes sense.
+      code === codes.eof ||
+      code === codes.leftSquareBracket ||
+      markdownLineEndingOrSpace(code)
+    ) {
+      return nok(code)
+    }
+
+    if (code === codes.rightSquareBracket) {
+      effects.exit('chunkString')
+      const token = effects.exit('gfmFootnoteCallString')
+
+      if (!defined.includes(normalizeIdentifier(self.sliceSerialize(token)))) {
+        return nok(code)
+      }
+
+      effects.enter('gfmFootnoteCallLabelMarker')
+      effects.consume(code)
+      effects.exit('gfmFootnoteCallLabelMarker')
+      effects.exit('gfmFootnoteCall')
+      return ok
+    }
+
+    if (!markdownLineEndingOrSpace(code)) {
+      data = true
+    }
+
+    size++
+    effects.consume(code)
+    return code === codes.backslash ? callEscape : callData
+  }
+
+  /**
+   * On character after escape.
+   *
+   * ```markdown
+   * > | a [^b\c] d
+   *           ^
+   * ```
+   *
+   * @type {State}
+   */
+  function callEscape(code) {
+    if (
+      code === codes.leftSquareBracket ||
+      code === codes.backslash ||
+      code === codes.rightSquareBracket
+    ) {
+      effects.consume(code)
+      size++
+      return callData
+    }
+
+    return callData(code)
+  }
+}
+
+/**
+ * @this {TokenizeContext}
+ * @type {Tokenizer}
+ */
+function tokenizeDefinitionStart(effects, ok, nok) {
+  const self = this
+  const defined = self.parser.gfmFootnotes || (self.parser.gfmFootnotes = [])
+  /** @type {string} */
+  let identifier
+  let size = 0
+  /** @type {boolean | undefined} */
+  let data
+
+  return start
+
+  /**
+   * Start of GFM footnote definition.
+   *
+   * ```markdown
+   * > | [^a]: b
+   *     ^
+   * ```
+   *
+   * @type {State}
+   */
+  function start(code) {
+    assert(code === codes.leftSquareBracket, 'expected `[`')
+    effects.enter('gfmFootnoteDefinition')._container = true
+    effects.enter('gfmFootnoteDefinitionLabel')
+    effects.enter('gfmFootnoteDefinitionLabelMarker')
+    effects.consume(code)
+    effects.exit('gfmFootnoteDefinitionLabelMarker')
+    return labelAtMarker
+  }
+
+  /**
+   * In label, at caret.
+   *
+   * ```markdown
+   * > | [^a]: b
+   *      ^
+   * ```
+   *
+   * @type {State}
+   */
+  function labelAtMarker(code) {
+    if (code === codes.caret) {
+      effects.enter('gfmFootnoteDefinitionMarker')
+      effects.consume(code)
+      effects.exit('gfmFootnoteDefinitionMarker')
+      effects.enter('gfmFootnoteDefinitionLabelString')
+      effects.enter('chunkString').contentType = 'string'
+      return labelInside
+    }
+
+    return nok(code)
+  }
+
+  /**
+   * In label.
+   *
+   * > 👉 **Note**: `cmark-gfm` prevents whitespace from occurring in footnote
+   * > definition labels.
+   *
+   * ```markdown
+   * > | [^a]: b
+   *       ^
+   * ```
+   *
+   * @type {State}
+   */
+  function labelInside(code) {
+    if (
+      // Too long.
+      size > constants.linkReferenceSizeMax ||
+      // Closing brace with nothing.
+      (code === codes.rightSquareBracket && !data) ||
+      // Space or tab is not supported by GFM for some reason.
+      // `\n` and `[` not being supported makes sense.
+      code === codes.eof ||
+      code === codes.leftSquareBracket ||
+      markdownLineEndingOrSpace(code)
+    ) {
+      return nok(code)
+    }
+
+    if (code === codes.rightSquareBracket) {
+      effects.exit('chunkString')
+      const token = effects.exit('gfmFootnoteDefinitionLabelString')
+      identifier = normalizeIdentifier(self.sliceSerialize(token))
+      effects.enter('gfmFootnoteDefinitionLabelMarker')
+      effects.consume(code)
+      effects.exit('gfmFootnoteDefinitionLabelMarker')
+      effects.exit('gfmFootnoteDefinitionLabel')
+      return labelAfter
+    }
+
+    if (!markdownLineEndingOrSpace(code)) {
+      data = true
+    }
+
+    size++
+    effects.consume(code)
+    return code === codes.backslash ? labelEscape : labelInside
+  }
+
+  /**
+   * After `\`, at a special character.
+   *
+   * > 👉 **Note**: `cmark-gfm` currently does not support escaped brackets:
+   * > <https://github.com/github/cmark-gfm/issues/240>
+   *
+   * ```markdown
+   * > | [^a\*b]: c
+   *         ^
+   * ```
+   *
+   * @type {State}
+   */
+  function labelEscape(code) {
+    if (
+      code === codes.leftSquareBracket ||
+      code === codes.backslash ||
+      code === codes.rightSquareBracket
+    ) {
+      effects.consume(code)
+      size++
+      return labelInside
+    }
+
+    return labelInside(code)
+  }
+
+  /**
+   * After definition label.
+   *
+   * ```markdown
+   * > | [^a]: b
+   *         ^
+   * ```
+   *
+   * @type {State}
+   */
+  function labelAfter(code) {
+    if (code === codes.colon) {
+      effects.enter('definitionMarker')
+      effects.consume(code)
+      effects.exit('definitionMarker')
+
+      if (!defined.includes(identifier)) {
+        defined.push(identifier)
+      }
+
+      // Any whitespace after the marker is eaten, forming indented code
+      // is not possible.
+      // No space is also fine, just like a block quote marker.
+      return factorySpace(
+        effects,
+        whitespaceAfter,
+        'gfmFootnoteDefinitionWhitespace'
+      )
+    }
+
+    return nok(code)
+  }
+
+  /**
+   * After definition prefix.
+   *
+   * ```markdown
+   * > | [^a]: b
+   *           ^
+   * ```
+   *
+   * @type {State}
+   */
+  function whitespaceAfter(code) {
+    // `markdown-rs` has a wrapping token for the prefix that is closed here.
+    return ok(code)
+  }
+}
+
+/**
+ * @this {TokenizeContext}
+ * @type {Tokenizer}
+ */
+function tokenizeDefinitionContinuation(effects, ok, nok) {
+  /// Start of footnote definition continuation.
+  ///
+  /// ```markdown
+  ///   | [^a]: b
+  /// > |     c
+  ///     ^
+  /// ```
+  //
+  // Either a blank line, which is okay, or an indented thing.
+  return effects.check(blankLine, ok, effects.attempt(indent, ok, nok))
+}
+
+/** @type {Exiter} */
+function gfmFootnoteDefinitionEnd(effects) {
+  effects.exit('gfmFootnoteDefinition')
+}
+
+/**
+ * @this {TokenizeContext}
+ * @type {Tokenizer}
+ */
+function tokenizeIndent(effects, ok, nok) {
+  const self = this
+
+  return factorySpace(
+    effects,
+    afterPrefix,
+    'gfmFootnoteDefinitionIndent',
+    constants.tabSize + 1
+  )
+
+  /**
+   * @type {State}
+   */
+  function afterPrefix(code) {
+    const tail = self.events[self.events.length - 1]
+    return tail &&
+      tail[1].type === 'gfmFootnoteDefinitionIndent' &&
+      tail[2].sliceSerialize(tail[1], true).length === constants.tabSize
+      ? ok(code)
+      : nok(code)
+  }
+}

node_modules/micromark-extension-gfm-footnote/index.d.ts

@@ -0,0 +1,34 @@
+export {gfmFootnote} from './lib/syntax.js'
+export {
+  gfmFootnoteHtml,
+  defaultBackLabel,
+  type BackLabelTemplate,
+  type Options as HtmlOptions
+} from './lib/html.js'
+
+declare module 'micromark-util-types' {
+  interface TokenTypeMap {
+    gfmFootnoteCall: 'gfmFootnoteCall'
+    gfmFootnoteCallLabelMarker: 'gfmFootnoteCallLabelMarker'
+    gfmFootnoteCallMarker: 'gfmFootnoteCallMarker'
+    gfmFootnoteCallString: 'gfmFootnoteCallString'
+    gfmFootnoteDefinition: 'gfmFootnoteDefinition'
+    gfmFootnoteDefinitionIndent: 'gfmFootnoteDefinitionIndent'
+    gfmFootnoteDefinitionLabel: 'gfmFootnoteDefinitionLabel'
+    gfmFootnoteDefinitionLabelMarker: 'gfmFootnoteDefinitionLabelMarker'
+    gfmFootnoteDefinitionLabelString: 'gfmFootnoteDefinitionLabelString'
+    gfmFootnoteDefinitionMarker: 'gfmFootnoteDefinitionMarker'
+    gfmFootnoteDefinitionWhitespace: 'gfmFootnoteDefinitionWhitespace'
+  }
+
+  interface ParseContext {
+    gfmFootnotes?: string[]
+  }
+
+  interface CompileData {
+    gfmFootnoteDefinitions?: Record<string, string>
+    gfmFootnoteDefinitionStack?: string[]
+    gfmFootnoteCallCounts?: Record<string, number>
+    gfmFootnoteCallOrder?: string[]
+  }
+}

node_modules/micromark-extension-gfm-footnote/index.js

@@ -0,0 +1,3 @@
+// Note: types are exported from `dev/index.d.ts`.
+export {gfmFootnote} from './lib/syntax.js'
+export {gfmFootnoteHtml, defaultBackLabel} from './lib/html.js'

node_modules/micromark-extension-gfm-footnote/lib/html.d.ts

@@ -0,0 +1,142 @@
+/**
+ * Generate the default label that GitHub uses on backreferences.
+ *
+ * @param {number} referenceIndex
+ *   Index of the definition in the order that they are first referenced,
+ *   0-indexed.
+ * @param {number} rereferenceIndex
+ *   Index of calls to the same definition, 0-indexed.
+ * @returns {string}
+ *   Default label.
+ */
+export function defaultBackLabel(
+  referenceIndex: number,
+  rereferenceIndex: number
+): string
+/**
+ * Create an extension for `micromark` to support GFM footnotes when
+ * serializing to HTML.
+ *
+ * @param {Options | null | undefined} [options={}]
+ *   Configuration (optional).
+ * @returns {HtmlExtension}
+ *   Extension for `micromark` that can be passed in `htmlExtensions` to
+ *   support GFM footnotes when serializing to HTML.
+ */
+export function gfmFootnoteHtml(
+  options?: Options | null | undefined
+): HtmlExtension
+export type HtmlExtension = import('micromark-util-types').HtmlExtension
+/**
+ * Generate a back label dynamically.
+ *
+ * For the following markdown:
+ *
+ * ```markdown
+ * Alpha[^micromark], bravo[^micromark], and charlie[^remark].
+ *
+ * [^remark]: things about remark
+ * [^micromark]: things about micromark
+ * ```
+ *
+ * This function will be called with:
+ *
+ * * `0` and `0` for the backreference from `things about micromark` to
+ *  `alpha`, as it is the first used definition, and the first call to it
+ * * `0` and `1` for the backreference from `things about micromark` to
+ *  `bravo`, as it is the first used definition, and the second call to it
+ * * `1` and `0` for the backreference from `things about remark` to
+ *  `charlie`, as it is the second used definition
+ */
+export type BackLabelTemplate = (
+  referenceIndex: number,
+  rereferenceIndex: number
+) => string
+/**
+ * Configuration.
+ */
+export type Options = {
+  /**
+   * Prefix to use before the `id` attribute on footnotes to prevent them from
+   * *clobbering* (default: `'user-content-'`).
+   *
+   * Pass `''` for trusted markdown and when you are careful with
+   * polyfilling.
+   * You could pass a different prefix.
+   *
+   * DOM clobbering is this:
+   *
+   * ```html
+   * <p id="x"></p>
+   * <script>alert(x) // `x` now refers to the `p#x` DOM element</script>
+   * ```
+   *
+   * The above example shows that elements are made available by browsers, by
+   * their ID, on the `window` object.
+   * This is a security risk because you might be expecting some other variable
+   * at that place.
+   * It can also break polyfills.
+   * Using a prefix solves these problems.
+   */
+  clobberPrefix?: string | null | undefined
+  /**
+   * Textual label to use for the footnotes section (default: `'Footnotes'`).
+   *
+   * Change it when the markdown is not in English.
+   *
+   * This label is typically hidden visually (assuming a `sr-only` CSS class
+   * is defined that does that) and so affects screen readers only.
+   * If you do have such a class, but want to show this section to everyone,
+   * pass different attributes with the `labelAttributes` option.
+   */
+  label?: string | null | undefined
+  /**
+   * Attributes to use on the footnote label (default: `'class="sr-only"'`).
+   *
+   * Change it to show the label and add other attributes.
+   *
+   * This label is typically hidden visually (assuming an `sr-only` CSS class
+   * is defined that does that) and so affects screen readers only.
+   * If you do have such a class, but want to show this section to everyone,
+   * pass an empty string.
+   * You can also add different attributes.
+   *
+   * > 👉 **Note**: `id="footnote-label"` is always added, because footnote
+   * > calls use it with `aria-describedby` to provide an accessible label.
+   */
+  labelAttributes?: string | null | undefined
+  /**
+   * HTML tag name to use for the footnote label element (default: `'h2'`).
+   *
+   * Change it to match your document structure.
+   *
+   * This label is typically hidden visually (assuming a `sr-only` CSS class
+   * is defined that does that) and so affects screen readers only.
+   * If you do have such a class, but want to show this section to everyone,
+   * pass different attributes with the `labelAttributes` option.
+   */
+  labelTagName?: string | null | undefined
+  /**
+   * Textual label to describe the backreference back to references (default:
+   * `defaultBackLabel`).
+   *
+   * The default value is:
+   *
+   * ```js
+   * function defaultBackLabel(referenceIndex, rereferenceIndex) {
+   * return (
+   * 'Back to reference ' +
+   * (referenceIndex + 1) +
+   * (rereferenceIndex > 1 ? '-' + rereferenceIndex : '')
+   * )
+   * }
+   * ```
+   *
+   * Change it when the markdown is not in English.
+   *
+   * This label is used in the `aria-label` attribute on each backreference
+   * (the `↩` links).
+   * It affects users of assistive technology.
+   */
+  backLabel?: BackLabelTemplate | string | null | undefined
+}

node_modules/micromark-extension-gfm-footnote/lib/html.js

@@ -0,0 +1,310 @@
+/**
+ * @typedef {import('micromark-util-types').HtmlExtension} HtmlExtension
+ */
+
+/**
+ * @callback BackLabelTemplate
+ *   Generate a back label dynamically.
+ *
+ *   For the following markdown:
+ *
+ *   ```markdown
+ *   Alpha[^micromark], bravo[^micromark], and charlie[^remark].
+ *
+ *   [^remark]: things about remark
+ *   [^micromark]: things about micromark
+ *   ```
+ *
+ *   This function will be called with:
+ *
+ *   * `0` and `0` for the backreference from `things about micromark` to
+ *      `alpha`, as it is the first used definition, and the first call to it
+ *   * `0` and `1` for the backreference from `things about micromark` to
+ *      `bravo`, as it is the first used definition, and the second call to it
+ *   * `1` and `0` for the backreference from `things about remark` to
+ *      `charlie`, as it is the second used definition
+ * @param {number} referenceIndex
+ *   Index of the definition in the order that they are first referenced,
+ *   0-indexed.
+ * @param {number} rereferenceIndex
+ *   Index of calls to the same definition, 0-indexed.
+ * @returns {string}
+ *   Back label to use when linking back from definitions to their reference.
+ */
+
+/**
+ * @typedef Options
+ *   Configuration.
+ * @property {string | null | undefined} [clobberPrefix='user-content-']
+ *   Prefix to use before the `id` attribute on footnotes to prevent them from
+ *   *clobbering* (default: `'user-content-'`).
+ *
+ *   Pass `''` for trusted markdown and when you are careful with
+ *   polyfilling.
+ *   You could pass a different prefix.
+ *
+ *   DOM clobbering is this:
+ *
+ *   ```html
+ *   <p id="x"></p>
+ *   <script>alert(x) // `x` now refers to the `p#x` DOM element</script>
+ *   ```
+ *
+ *   The above example shows that elements are made available by browsers, by
+ *   their ID, on the `window` object.
+ *   This is a security risk because you might be expecting some other variable
+ *   at that place.
+ *   It can also break polyfills.
+ *   Using a prefix solves these problems.
+ * @property {string | null | undefined} [label='Footnotes']
+ *   Textual label to use for the footnotes section (default: `'Footnotes'`).
+ *
+ *   Change it when the markdown is not in English.
+ *
+ *   This label is typically hidden visually (assuming a `sr-only` CSS class
+ *   is defined that does that) and so affects screen readers only.
+ *   If you do have such a class, but want to show this section to everyone,
+ *   pass different attributes with the `labelAttributes` option.
+ * @property {string | null | undefined} [labelAttributes='class="sr-only"']
+ *   Attributes to use on the footnote label (default: `'class="sr-only"'`).
+ *
+ *   Change it to show the label and add other attributes.
+ *
+ *   This label is typically hidden visually (assuming an `sr-only` CSS class
+ *   is defined that does that) and so affects screen readers only.
+ *   If you do have such a class, but want to show this section to everyone,
+ *   pass an empty string.
+ *   You can also add different attributes.
+ *
+ *   > 👉 **Note**: `id="footnote-label"` is always added, because footnote
+ *   > calls use it with `aria-describedby` to provide an accessible label.
+ * @property {string | null | undefined} [labelTagName='h2']
+ *   HTML tag name to use for the footnote label element (default: `'h2'`).
+ *
+ *   Change it to match your document structure.
+ *
+ *   This label is typically hidden visually (assuming a `sr-only` CSS class
+ *   is defined that does that) and so affects screen readers only.
+ *   If you do have such a class, but want to show this section to everyone,
+ *   pass different attributes with the `labelAttributes` option.
+ * @property {BackLabelTemplate | string | null | undefined} [backLabel]
+ *   Textual label to describe the backreference back to references (default:
+ *   `defaultBackLabel`).
+ *
+ *   The default value is:
+ *
+ *   ```js
+ *   function defaultBackLabel(referenceIndex, rereferenceIndex) {
+ *    return (
+ *      'Back to reference ' +
+ *      (referenceIndex + 1) +
+ *      (rereferenceIndex > 1 ? '-' + rereferenceIndex : '')
+ *    )
+ *  }
+ *   ```
+ *
+ *   Change it when the markdown is not in English.
+ *
+ *   This label is used in the `aria-label` attribute on each backreference
+ *   (the `↩` links).
+ *   It affects users of assistive technology.
+ */
+
+import {normalizeIdentifier} from 'micromark-util-normalize-identifier'
+import {sanitizeUri} from 'micromark-util-sanitize-uri'
+const own = {}.hasOwnProperty
+
+/** @type {Options} */
+const emptyOptions = {}
+
+/**
+ * Generate the default label that GitHub uses on backreferences.
+ *
+ * @param {number} referenceIndex
+ *   Index of the definition in the order that they are first referenced,
+ *   0-indexed.
+ * @param {number} rereferenceIndex
+ *   Index of calls to the same definition, 0-indexed.
+ * @returns {string}
+ *   Default label.
+ */
+export function defaultBackLabel(referenceIndex, rereferenceIndex) {
+  return (
+    'Back to reference ' +
+    (referenceIndex + 1) +
+    (rereferenceIndex > 1 ? '-' + rereferenceIndex : '')
+  )
+}
+
+/**
+ * Create an extension for `micromark` to support GFM footnotes when
+ * serializing to HTML.
+ *
+ * @param {Options | null | undefined} [options={}]
+ *   Configuration (optional).
+ * @returns {HtmlExtension}
+ *   Extension for `micromark` that can be passed in `htmlExtensions` to
+ *   support GFM footnotes when serializing to HTML.
+ */
+export function gfmFootnoteHtml(options) {
+  const config = options || emptyOptions
+  const label = config.label || 'Footnotes'
+  const labelTagName = config.labelTagName || 'h2'
+  const labelAttributes =
+    config.labelAttributes === null || config.labelAttributes === undefined
+      ? 'class="sr-only"'
+      : config.labelAttributes
+  const backLabel = config.backLabel || defaultBackLabel
+  const clobberPrefix =
+    config.clobberPrefix === null || config.clobberPrefix === undefined
+      ? 'user-content-'
+      : config.clobberPrefix
+  return {
+    enter: {
+      gfmFootnoteDefinition() {
+        const stack = this.getData('tightStack')
+        stack.push(false)
+      },
+      gfmFootnoteDefinitionLabelString() {
+        this.buffer()
+      },
+      gfmFootnoteCallString() {
+        this.buffer()
+      }
+    },
+    exit: {
+      gfmFootnoteDefinition() {
+        let definitions = this.getData('gfmFootnoteDefinitions')
+        const footnoteStack = this.getData('gfmFootnoteDefinitionStack')
+        const tightStack = this.getData('tightStack')
+        const current = footnoteStack.pop()
+        const value = this.resume()
+        if (!definitions) {
+          this.setData('gfmFootnoteDefinitions', (definitions = {}))
+        }
+        if (!own.call(definitions, current)) definitions[current] = value
+        tightStack.pop()
+        this.setData('slurpOneLineEnding', true)
+        // “Hack” to prevent a line ending from showing up if we’re in a definition in
+        // an empty list item.
+        this.setData('lastWasTag')
+      },
+      gfmFootnoteDefinitionLabelString(token) {
+        let footnoteStack = this.getData('gfmFootnoteDefinitionStack')
+        if (!footnoteStack) {
+          this.setData('gfmFootnoteDefinitionStack', (footnoteStack = []))
+        }
+        footnoteStack.push(normalizeIdentifier(this.sliceSerialize(token)))
+        this.resume() // Drop the label.
+        this.buffer() // Get ready for a value.
+      },
+
+      gfmFootnoteCallString(token) {
+        let calls = this.getData('gfmFootnoteCallOrder')
+        let counts = this.getData('gfmFootnoteCallCounts')
+        const id = normalizeIdentifier(this.sliceSerialize(token))
+        /** @type {number} */
+        let counter
+        this.resume()
+        if (!calls) this.setData('gfmFootnoteCallOrder', (calls = []))
+        if (!counts) this.setData('gfmFootnoteCallCounts', (counts = {}))
+        const index = calls.indexOf(id)
+        const safeId = sanitizeUri(id.toLowerCase())
+        if (index === -1) {
+          calls.push(id)
+          counts[id] = 1
+          counter = calls.length
+        } else {
+          counts[id]++
+          counter = index + 1
+        }
+        const reuseCounter = counts[id]
+        this.tag(
+          '<sup><a href="#' +
+            clobberPrefix +
+            'fn-' +
+            safeId +
+            '" id="' +
+            clobberPrefix +
+            'fnref-' +
+            safeId +
+            (reuseCounter > 1 ? '-' + reuseCounter : '') +
+            '" data-footnote-ref="" aria-describedby="footnote-label">' +
+            String(counter) +
+            '</a></sup>'
+        )
+      },
+      null() {
+        const calls = this.getData('gfmFootnoteCallOrder') || []
+        const counts = this.getData('gfmFootnoteCallCounts') || {}
+        const definitions = this.getData('gfmFootnoteDefinitions') || {}
+        let index = -1
+        if (calls.length > 0) {
+          this.lineEndingIfNeeded()
+          this.tag(
+            '<section data-footnotes="" class="footnotes"><' +
+              labelTagName +
+              ' id="footnote-label"' +
+              (labelAttributes ? ' ' + labelAttributes : '') +
+              '>'
+          )
+          this.raw(this.encode(label))
+          this.tag('</' + labelTagName + '>')
+          this.lineEndingIfNeeded()
+          this.tag('<ol>')
+        }
+        while (++index < calls.length) {
+          // Called definitions are always defined.
+          const id = calls[index]
+          const safeId = sanitizeUri(id.toLowerCase())
+          let referenceIndex = 0
+          /** @type {Array<string>} */
+          const references = []
+          while (++referenceIndex <= counts[id]) {
+            references.push(
+              '<a href="#' +
+                clobberPrefix +
+                'fnref-' +
+                safeId +
+                (referenceIndex > 1 ? '-' + referenceIndex : '') +
+                '" data-footnote-backref="" aria-label="' +
+                this.encode(
+                  typeof backLabel === 'string'
+                    ? backLabel
+                    : backLabel(index, referenceIndex)
+                ) +
+                '" class="data-footnote-backref">↩' +
+                (referenceIndex > 1
+                  ? '<sup>' + referenceIndex + '</sup>'
+                  : '') +
+                '</a>'
+            )
+          }
+          const reference = references.join(' ')
+          let injected = false
+          this.lineEndingIfNeeded()
+          this.tag('<li id="' + clobberPrefix + 'fn-' + safeId + '">')
+          this.lineEndingIfNeeded()
+          this.tag(
+            definitions[id].replace(/<\/p>(?:\r?\n|\r)?$/, function ($0) {
+              injected = true
+              return ' ' + reference + $0
+            })
+          )
+          if (!injected) {
+            this.lineEndingIfNeeded()
+            this.tag(reference)
+          }
+          this.lineEndingIfNeeded()
+          this.tag('</li>')
+        }
+        if (calls.length > 0) {
+          this.lineEndingIfNeeded()
+          this.tag('</ol>')
+          this.lineEndingIfNeeded()
+          this.tag('</section>')
+        }
+      }
+    }
+  }
+}

node_modules/micromark-extension-gfm-footnote/lib/syntax.d.ts

@@ -0,0 +1,16 @@
+/**
+ * Create an extension for `micromark` to enable GFM footnote syntax.
+ *
+ * @returns {Extension}
+ *   Extension for `micromark` that can be passed in `extensions` to
+ *   enable GFM footnote syntax.
+ */
+export function gfmFootnote(): Extension
+export type Event = import('micromark-util-types').Event
+export type Exiter = import('micromark-util-types').Exiter
+export type Extension = import('micromark-util-types').Extension
+export type Resolver = import('micromark-util-types').Resolver
+export type State = import('micromark-util-types').State
+export type Token = import('micromark-util-types').Token
+export type TokenizeContext = import('micromark-util-types').TokenizeContext
+export type Tokenizer = import('micromark-util-types').Tokenizer

node_modules/micromark-extension-gfm-footnote/lib/syntax.js

@@ -0,0 +1,529 @@
+/**
+ * @typedef {import('micromark-util-types').Event} Event
+ * @typedef {import('micromark-util-types').Exiter} Exiter
+ * @typedef {import('micromark-util-types').Extension} Extension
+ * @typedef {import('micromark-util-types').Resolver} Resolver
+ * @typedef {import('micromark-util-types').State} State
+ * @typedef {import('micromark-util-types').Token} Token
+ * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext
+ * @typedef {import('micromark-util-types').Tokenizer} Tokenizer
+ */
+
+import {blankLine} from 'micromark-core-commonmark'
+import {factorySpace} from 'micromark-factory-space'
+import {markdownLineEndingOrSpace} from 'micromark-util-character'
+import {normalizeIdentifier} from 'micromark-util-normalize-identifier'
+const indent = {
+  tokenize: tokenizeIndent,
+  partial: true
+}
+
+// To do: micromark should support a `_hiddenGfmFootnoteSupport`, which only
+// affects label start (image).
+// That will let us drop `tokenizePotentialGfmFootnote*`.
+// It currently has a `_hiddenFootnoteSupport`, which affects that and more.
+// That can be removed when `micromark-extension-footnote` is archived.
+
+/**
+ * Create an extension for `micromark` to enable GFM footnote syntax.
+ *
+ * @returns {Extension}
+ *   Extension for `micromark` that can be passed in `extensions` to
+ *   enable GFM footnote syntax.
+ */
+export function gfmFootnote() {
+  /** @type {Extension} */
+  return {
+    document: {
+      [91]: {
+        tokenize: tokenizeDefinitionStart,
+        continuation: {
+          tokenize: tokenizeDefinitionContinuation
+        },
+        exit: gfmFootnoteDefinitionEnd
+      }
+    },
+    text: {
+      [91]: {
+        tokenize: tokenizeGfmFootnoteCall
+      },
+      [93]: {
+        add: 'after',
+        tokenize: tokenizePotentialGfmFootnoteCall,
+        resolveTo: resolveToPotentialGfmFootnoteCall
+      }
+    }
+  }
+}
+
+// To do: remove after micromark update.
+/**
+ * @this {TokenizeContext}
+ * @type {Tokenizer}
+ */
+function tokenizePotentialGfmFootnoteCall(effects, ok, nok) {
+  const self = this
+  let index = self.events.length
+  const defined = self.parser.gfmFootnotes || (self.parser.gfmFootnotes = [])
+  /** @type {Token} */
+  let labelStart
+
+  // Find an opening.
+  while (index--) {
+    const token = self.events[index][1]
+    if (token.type === 'labelImage') {
+      labelStart = token
+      break
+    }
+
+    // Exit if we’ve walked far enough.
+    if (
+      token.type === 'gfmFootnoteCall' ||
+      token.type === 'labelLink' ||
+      token.type === 'label' ||
+      token.type === 'image' ||
+      token.type === 'link'
+    ) {
+      break
+    }
+  }
+  return start
+
+  /**
+   * @type {State}
+   */
+  function start(code) {
+    if (!labelStart || !labelStart._balanced) {
+      return nok(code)
+    }
+    const id = normalizeIdentifier(
+      self.sliceSerialize({
+        start: labelStart.end,
+        end: self.now()
+      })
+    )
+    if (id.codePointAt(0) !== 94 || !defined.includes(id.slice(1))) {
+      return nok(code)
+    }
+    effects.enter('gfmFootnoteCallLabelMarker')
+    effects.consume(code)
+    effects.exit('gfmFootnoteCallLabelMarker')
+    return ok(code)
+  }
+}
+
+// To do: remove after micromark update.
+/** @type {Resolver} */
+function resolveToPotentialGfmFootnoteCall(events, context) {
+  let index = events.length
+  /** @type {Token | undefined} */
+  let labelStart
+
+  // Find an opening.
+  while (index--) {
+    if (
+      events[index][1].type === 'labelImage' &&
+      events[index][0] === 'enter'
+    ) {
+      labelStart = events[index][1]
+      break
+    }
+  }
+  // Change the `labelImageMarker` to a `data`.
+  events[index + 1][1].type = 'data'
+  events[index + 3][1].type = 'gfmFootnoteCallLabelMarker'
+
+  // The whole (without `!`):
+  /** @type {Token} */
+  const call = {
+    type: 'gfmFootnoteCall',
+    start: Object.assign({}, events[index + 3][1].start),
+    end: Object.assign({}, events[events.length - 1][1].end)
+  }
+  // The `^` marker
+  /** @type {Token} */
+  const marker = {
+    type: 'gfmFootnoteCallMarker',
+    start: Object.assign({}, events[index + 3][1].end),
+    end: Object.assign({}, events[index + 3][1].end)
+  }
+  // Increment the end 1 character.
+  marker.end.column++
+  marker.end.offset++
+  marker.end._bufferIndex++
+  /** @type {Token} */
+  const string = {
+    type: 'gfmFootnoteCallString',
+    start: Object.assign({}, marker.end),
+    end: Object.assign({}, events[events.length - 1][1].start)
+  }
+  /** @type {Token} */
+  const chunk = {
+    type: 'chunkString',
+    contentType: 'string',
+    start: Object.assign({}, string.start),
+    end: Object.assign({}, string.end)
+  }
+
+  /** @type {Array<Event>} */
+  const replacement = [
+    // Take the `labelImageMarker` (now `data`, the `!`)
+    events[index + 1],
+    events[index + 2],
+    ['enter', call, context],
+    // The `[`
+    events[index + 3],
+    events[index + 4],
+    // The `^`.
+    ['enter', marker, context],
+    ['exit', marker, context],
+    // Everything in between.
+    ['enter', string, context],
+    ['enter', chunk, context],
+    ['exit', chunk, context],
+    ['exit', string, context],
+    // The ending (`]`, properly parsed and labelled).
+    events[events.length - 2],
+    events[events.length - 1],
+    ['exit', call, context]
+  ]
+  events.splice(index, events.length - index + 1, ...replacement)
+  return events
+}
+
+/**
+ * @this {TokenizeContext}
+ * @type {Tokenizer}
+ */
+function tokenizeGfmFootnoteCall(effects, ok, nok) {
+  const self = this
+  const defined = self.parser.gfmFootnotes || (self.parser.gfmFootnotes = [])
+  let size = 0
+  /** @type {boolean} */
+  let data
+
+  // Note: the implementation of `markdown-rs` is different, because it houses
+  // core *and* extensions in one project.
+  // Therefore, it can include footnote logic inside `label-end`.
+  // We can’t do that, but luckily, we can parse footnotes in a simpler way than
+  // needed for labels.
+  return start
+
+  /**
+   * Start of footnote label.
+   *
+   * ```markdown
+   * > | a [^b] c
+   *       ^
+   * ```
+   *
+   * @type {State}
+   */
+  function start(code) {
+    effects.enter('gfmFootnoteCall')
+    effects.enter('gfmFootnoteCallLabelMarker')
+    effects.consume(code)
+    effects.exit('gfmFootnoteCallLabelMarker')
+    return callStart
+  }
+
+  /**
+   * After `[`, at `^`.
+   *
+   * ```markdown
+   * > | a [^b] c
+   *        ^
+   * ```
+   *
+   * @type {State}
+   */
+  function callStart(code) {
+    if (code !== 94) return nok(code)
+    effects.enter('gfmFootnoteCallMarker')
+    effects.consume(code)
+    effects.exit('gfmFootnoteCallMarker')
+    effects.enter('gfmFootnoteCallString')
+    effects.enter('chunkString').contentType = 'string'
+    return callData
+  }
+
+  /**
+   * In label.
+   *
+   * ```markdown
+   * > | a [^b] c
+   *         ^
+   * ```
+   *
+   * @type {State}
+   */
+  function callData(code) {
+    if (
+      // Too long.
+      size > 999 ||
+      // Closing brace with nothing.
+      (code === 93 && !data) ||
+      // Space or tab is not supported by GFM for some reason.
+      // `\n` and `[` not being supported makes sense.
+      code === null ||
+      code === 91 ||
+      markdownLineEndingOrSpace(code)
+    ) {
+      return nok(code)
+    }
+    if (code === 93) {
+      effects.exit('chunkString')
+      const token = effects.exit('gfmFootnoteCallString')
+      if (!defined.includes(normalizeIdentifier(self.sliceSerialize(token)))) {
+        return nok(code)
+      }
+      effects.enter('gfmFootnoteCallLabelMarker')
+      effects.consume(code)
+      effects.exit('gfmFootnoteCallLabelMarker')
+      effects.exit('gfmFootnoteCall')
+      return ok
+    }
+    if (!markdownLineEndingOrSpace(code)) {
+      data = true
+    }
+    size++
+    effects.consume(code)
+    return code === 92 ? callEscape : callData
+  }
+
+  /**
+   * On character after escape.
+   *
+   * ```markdown
+   * > | a [^b\c] d
+   *           ^
+   * ```
+   *
+   * @type {State}
+   */
+  function callEscape(code) {
+    if (code === 91 || code === 92 || code === 93) {
+      effects.consume(code)
+      size++
+      return callData
+    }
+    return callData(code)
+  }
+}
+
+/**
+ * @this {TokenizeContext}
+ * @type {Tokenizer}
+ */
+function tokenizeDefinitionStart(effects, ok, nok) {
+  const self = this
+  const defined = self.parser.gfmFootnotes || (self.parser.gfmFootnotes = [])
+  /** @type {string} */
+  let identifier
+  let size = 0
+  /** @type {boolean | undefined} */
+  let data
+  return start
+
+  /**
+   * Start of GFM footnote definition.
+   *
+   * ```markdown
+   * > | [^a]: b
+   *     ^
+   * ```
+   *
+   * @type {State}
+   */
+  function start(code) {
+    effects.enter('gfmFootnoteDefinition')._container = true
+    effects.enter('gfmFootnoteDefinitionLabel')
+    effects.enter('gfmFootnoteDefinitionLabelMarker')
+    effects.consume(code)
+    effects.exit('gfmFootnoteDefinitionLabelMarker')
+    return labelAtMarker
+  }
+
+  /**
+   * In label, at caret.
+   *
+   * ```markdown
+   * > | [^a]: b
+   *      ^
+   * ```
+   *
+   * @type {State}
+   */
+  function labelAtMarker(code) {
+    if (code === 94) {
+      effects.enter('gfmFootnoteDefinitionMarker')
+      effects.consume(code)
+      effects.exit('gfmFootnoteDefinitionMarker')
+      effects.enter('gfmFootnoteDefinitionLabelString')
+      effects.enter('chunkString').contentType = 'string'
+      return labelInside
+    }
+    return nok(code)
+  }
+
+  /**
+   * In label.
+   *
+   * > 👉 **Note**: `cmark-gfm` prevents whitespace from occurring in footnote
+   * > definition labels.
+   *
+   * ```markdown
+   * > | [^a]: b
+   *       ^
+   * ```
+   *
+   * @type {State}
+   */
+  function labelInside(code) {
+    if (
+      // Too long.
+      size > 999 ||
+      // Closing brace with nothing.
+      (code === 93 && !data) ||
+      // Space or tab is not supported by GFM for some reason.
+      // `\n` and `[` not being supported makes sense.
+      code === null ||
+      code === 91 ||
+      markdownLineEndingOrSpace(code)
+    ) {
+      return nok(code)
+    }
+    if (code === 93) {
+      effects.exit('chunkString')
+      const token = effects.exit('gfmFootnoteDefinitionLabelString')
+      identifier = normalizeIdentifier(self.sliceSerialize(token))
+      effects.enter('gfmFootnoteDefinitionLabelMarker')
+      effects.consume(code)
+      effects.exit('gfmFootnoteDefinitionLabelMarker')
+      effects.exit('gfmFootnoteDefinitionLabel')
+      return labelAfter
+    }
+    if (!markdownLineEndingOrSpace(code)) {
+      data = true
+    }
+    size++
+    effects.consume(code)
+    return code === 92 ? labelEscape : labelInside
+  }
+
+  /**
+   * After `\`, at a special character.
+   *
+   * > 👉 **Note**: `cmark-gfm` currently does not support escaped brackets:
+   * > <https://github.com/github/cmark-gfm/issues/240>
+   *
+   * ```markdown
+   * > | [^a\*b]: c
+   *         ^
+   * ```
+   *
+   * @type {State}
+   */
+  function labelEscape(code) {
+    if (code === 91 || code === 92 || code === 93) {
+      effects.consume(code)
+      size++
+      return labelInside
+    }
+    return labelInside(code)
+  }
+
+  /**
+   * After definition label.
+   *
+   * ```markdown
+   * > | [^a]: b
+   *         ^
+   * ```
+   *
+   * @type {State}
+   */
+  function labelAfter(code) {
+    if (code === 58) {
+      effects.enter('definitionMarker')
+      effects.consume(code)
+      effects.exit('definitionMarker')
+      if (!defined.includes(identifier)) {
+        defined.push(identifier)
+      }
+
+      // Any whitespace after the marker is eaten, forming indented code
+      // is not possible.
+      // No space is also fine, just like a block quote marker.
+      return factorySpace(
+        effects,
+        whitespaceAfter,
+        'gfmFootnoteDefinitionWhitespace'
+      )
+    }
+    return nok(code)
+  }
+
+  /**
+   * After definition prefix.
+   *
+   * ```markdown
+   * > | [^a]: b
+   *           ^
+   * ```
+   *
+   * @type {State}
+   */
+  function whitespaceAfter(code) {
+    // `markdown-rs` has a wrapping token for the prefix that is closed here.
+    return ok(code)
+  }
+}
+
+/**
+ * @this {TokenizeContext}
+ * @type {Tokenizer}
+ */
+function tokenizeDefinitionContinuation(effects, ok, nok) {
+  /// Start of footnote definition continuation.
+  ///
+  /// ```markdown
+  ///   | [^a]: b
+  /// > |     c
+  ///     ^
+  /// ```
+  //
+  // Either a blank line, which is okay, or an indented thing.
+  return effects.check(blankLine, ok, effects.attempt(indent, ok, nok))
+}
+
+/** @type {Exiter} */
+function gfmFootnoteDefinitionEnd(effects) {
+  effects.exit('gfmFootnoteDefinition')
+}
+
+/**
+ * @this {TokenizeContext}
+ * @type {Tokenizer}
+ */
+function tokenizeIndent(effects, ok, nok) {
+  const self = this
+  return factorySpace(
+    effects,
+    afterPrefix,
+    'gfmFootnoteDefinitionIndent',
+    4 + 1
+  )
+
+  /**
+   * @type {State}
+   */
+  function afterPrefix(code) {
+    const tail = self.events[self.events.length - 1]
+    return tail &&
+      tail[1].type === 'gfmFootnoteDefinitionIndent' &&
+      tail[2].sliceSerialize(tail[1], true).length === 4
+      ? ok(code)
+      : nok(code)
+  }
+}

node_modules/micromark-extension-gfm-footnote/license

@@ -0,0 +1,22 @@
+(The MIT License)
+
+Copyright (c) 2021 Titus Wormer <tituswormer@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-factory-space/dev/index.d.ts

@@ -0,0 +1,41 @@
+/**
+ * Parse spaces and tabs.
+ *
+ * There is no `nok` parameter:
+ *
+ * *   spaces in markdown are often optional, in which case this factory can be
+ *     used and `ok` will be switched to whether spaces were found or not
+ * *   one line ending or space can be detected with `markdownSpace(code)` right
+ *     before using `factorySpace`
+ *
+ * ###### Examples
+ *
+ * Where `␉` represents a tab (plus how much it expands) and `␠` represents a
+ * single space.
+ *
+ * ```markdown
+ * ␉
+ * ␠␠␠␠
+ * ␉␠
+ * ```
+ *
+ * @param {Effects} effects
+ *   Context.
+ * @param {State} ok
+ *   State switched to when successful.
+ * @param {TokenType} type
+ *   Type (`' \t'`).
+ * @param {number | undefined} [max=Infinity]
+ *   Max (exclusive).
+ * @returns {State}
+ *   Start state.
+ */
+export function factorySpace(
+  effects: Effects,
+  ok: State,
+  type: TokenType,
+  max?: number | undefined
+): State
+export type Effects = import('micromark-util-types').Effects
+export type State = import('micromark-util-types').State
+export type TokenType = import('micromark-util-types').TokenType

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-factory-space/dev/index.js

@@ -0,0 +1,69 @@
+/**
+ * @typedef {import('micromark-util-types').Effects} Effects
+ * @typedef {import('micromark-util-types').State} State
+ * @typedef {import('micromark-util-types').TokenType} TokenType
+ */
+
+import {markdownSpace} from 'micromark-util-character'
+
+// To do: implement `spaceOrTab`, `spaceOrTabMinMax`, `spaceOrTabWithOptions`.
+
+/**
+ * Parse spaces and tabs.
+ *
+ * There is no `nok` parameter:
+ *
+ * *   spaces in markdown are often optional, in which case this factory can be
+ *     used and `ok` will be switched to whether spaces were found or not
+ * *   one line ending or space can be detected with `markdownSpace(code)` right
+ *     before using `factorySpace`
+ *
+ * ###### Examples
+ *
+ * Where `␉` represents a tab (plus how much it expands) and `␠` represents a
+ * single space.
+ *
+ * ```markdown
+ * ␉
+ * ␠␠␠␠
+ * ␉␠
+ * ```
+ *
+ * @param {Effects} effects
+ *   Context.
+ * @param {State} ok
+ *   State switched to when successful.
+ * @param {TokenType} type
+ *   Type (`' \t'`).
+ * @param {number | undefined} [max=Infinity]
+ *   Max (exclusive).
+ * @returns {State}
+ *   Start state.
+ */
+export function factorySpace(effects, ok, type, max) {
+  const limit = max ? max - 1 : Number.POSITIVE_INFINITY
+  let size = 0
+
+  return start
+
+  /** @type {State} */
+  function start(code) {
+    if (markdownSpace(code)) {
+      effects.enter(type)
+      return prefix(code)
+    }
+
+    return ok(code)
+  }
+
+  /** @type {State} */
+  function prefix(code) {
+    if (markdownSpace(code) && size++ < limit) {
+      effects.consume(code)
+      return prefix
+    }
+
+    effects.exit(type)
+    return ok(code)
+  }
+}

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-factory-space/index.d.ts

@@ -0,0 +1,41 @@
+/**
+ * Parse spaces and tabs.
+ *
+ * There is no `nok` parameter:
+ *
+ * *   spaces in markdown are often optional, in which case this factory can be
+ *     used and `ok` will be switched to whether spaces were found or not
+ * *   one line ending or space can be detected with `markdownSpace(code)` right
+ *     before using `factorySpace`
+ *
+ * ###### Examples
+ *
+ * Where `␉` represents a tab (plus how much it expands) and `␠` represents a
+ * single space.
+ *
+ * ```markdown
+ * ␉
+ * ␠␠␠␠
+ * ␉␠
+ * ```
+ *
+ * @param {Effects} effects
+ *   Context.
+ * @param {State} ok
+ *   State switched to when successful.
+ * @param {TokenType} type
+ *   Type (`' \t'`).
+ * @param {number | undefined} [max=Infinity]
+ *   Max (exclusive).
+ * @returns {State}
+ *   Start state.
+ */
+export function factorySpace(
+  effects: Effects,
+  ok: State,
+  type: TokenType,
+  max?: number | undefined
+): State
+export type Effects = import('micromark-util-types').Effects
+export type State = import('micromark-util-types').State
+export type TokenType = import('micromark-util-types').TokenType

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-factory-space/index.js

@@ -0,0 +1,66 @@
+/**
+ * @typedef {import('micromark-util-types').Effects} Effects
+ * @typedef {import('micromark-util-types').State} State
+ * @typedef {import('micromark-util-types').TokenType} TokenType
+ */
+
+import {markdownSpace} from 'micromark-util-character'
+
+// To do: implement `spaceOrTab`, `spaceOrTabMinMax`, `spaceOrTabWithOptions`.
+
+/**
+ * Parse spaces and tabs.
+ *
+ * There is no `nok` parameter:
+ *
+ * *   spaces in markdown are often optional, in which case this factory can be
+ *     used and `ok` will be switched to whether spaces were found or not
+ * *   one line ending or space can be detected with `markdownSpace(code)` right
+ *     before using `factorySpace`
+ *
+ * ###### Examples
+ *
+ * Where `␉` represents a tab (plus how much it expands) and `␠` represents a
+ * single space.
+ *
+ * ```markdown
+ * ␉
+ * ␠␠␠␠
+ * ␉␠
+ * ```
+ *
+ * @param {Effects} effects
+ *   Context.
+ * @param {State} ok
+ *   State switched to when successful.
+ * @param {TokenType} type
+ *   Type (`' \t'`).
+ * @param {number | undefined} [max=Infinity]
+ *   Max (exclusive).
+ * @returns {State}
+ *   Start state.
+ */
+export function factorySpace(effects, ok, type, max) {
+  const limit = max ? max - 1 : Number.POSITIVE_INFINITY
+  let size = 0
+  return start
+
+  /** @type {State} */
+  function start(code) {
+    if (markdownSpace(code)) {
+      effects.enter(type)
+      return prefix(code)
+    }
+    return ok(code)
+  }
+
+  /** @type {State} */
+  function prefix(code) {
+    if (markdownSpace(code) && size++ < limit) {
+      effects.consume(code)
+      return prefix
+    }
+    effects.exit(type)
+    return ok(code)
+  }
+}

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-factory-space/package.json

@@ -0,0 +1,46 @@
+{
+  "name": "micromark-factory-space",
+  "version": "2.0.0",
+  "description": "micromark factory to parse markdown space (found in lots of places)",
+  "license": "MIT",
+  "keywords": [
+    "micromark",
+    "factory",
+    "space"
+  ],
+  "repository": "https://github.com/micromark/micromark/tree/main/packages/micromark-factory-space",
+  "bugs": "https://github.com/micromark/micromark/issues",
+  "funding": [
+    {
+      "type": "GitHub Sponsors",
+      "url": "https://github.com/sponsors/unifiedjs"
+    },
+    {
+      "type": "OpenCollective",
+      "url": "https://opencollective.com/unified"
+    }
+  ],
+  "author": "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)",
+  "contributors": [
+    "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
+  ],
+  "sideEffects": false,
+  "type": "module",
+  "files": [
+    "dev/",
+    "index.d.ts",
+    "index.js"
+  ],
+  "exports": {
+    "development": "./dev/index.js",
+    "default": "./index.js"
+  },
+  "dependencies": {
+    "micromark-util-character": "^2.0.0",
+    "micromark-util-types": "^2.0.0"
+  },
+  "scripts": {
+    "build": "micromark-build"
+  },
+  "xo": false
+}

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-factory-space/readme.md

@@ -0,0 +1,224 @@
+# micromark-factory-space
+
+[![Build][build-badge]][build]
+[![Coverage][coverage-badge]][coverage]
+[![Downloads][downloads-badge]][downloads]
+[![Size][bundle-size-badge]][bundle-size]
+[![Sponsors][sponsors-badge]][opencollective]
+[![Backers][backers-badge]][opencollective]
+[![Chat][chat-badge]][chat]
+
+[micromark][] factory to parse [markdown space][markdown-space] (found in lots
+of places).
+
+## Contents
+
+*   [What is this?](#what-is-this)
+*   [When should I use this?](#when-should-i-use-this)
+*   [Install](#install)
+*   [Use](#use)
+*   [API](#api)
+    *   [`factorySpace(…)`](#factoryspace)
+*   [Types](#types)
+*   [Compatibility](#compatibility)
+*   [Security](#security)
+*   [Contribute](#contribute)
+*   [License](#license)
+
+## What is this?
+
+This package exposes states to parse spaces and/or tabs.
+
+## When should I use this?
+
+This package is useful when you are making your own micromark extensions.
+
+## Install
+
+This package is [ESM only][esm].
+In Node.js (version 16+), install with [npm][]:
+
+```sh
+npm install micromark-factory-space
+```
+
+In Deno with [`esm.sh`][esmsh]:
+
+```js
+import {factorySpace} from 'https://esm.sh/micromark-factory-space@1'
+```
+
+In browsers with [`esm.sh`][esmsh]:
+
+```html
+<script type="module">
+  import {factorySpace} from 'https://esm.sh/micromark-factory-space@1?bundle'
+</script>
+```
+
+## Use
+
+```js
+import {factorySpace} from 'micromark-factory-space'
+import {codes, types} from 'micromark-util-symbol'
+
+// A micromark tokenizer that uses the factory:
+/**
+ * @this {TokenizeContext}
+ * @type {Tokenizer}
+ */
+function tokenizeCodeFenced(effects, ok, nok) {
+  return start
+
+  // …
+
+  /** @type {State} */
+  function info(code) {
+    if (code === codes.eof || markdownLineEndingOrSpace(code)) {
+      effects.exit(types.chunkString)
+      effects.exit(types.codeFencedFenceInfo)
+      return factorySpace(effects, infoAfter, types.whitespace)(code)
+    }
+
+    if (code === codes.graveAccent && code === marker) return nok(code)
+    effects.consume(code)
+    return info
+  }
+
+  // …
+}
+```
+
+## API
+
+This module exports the identifier [`factorySpace`][api-factory-space].
+There is no default export.
+
+### `factorySpace(…)`
+
+Parse spaces and tabs.
+
+There is no `nok` parameter:
+
+*   spaces in markdown are often optional, in which case this factory can be
+    used and `ok` will be switched to whether spaces were found or not
+*   one line ending or space can be detected with `markdownSpace(code)` right
+    before using `factorySpace`
+
+###### Examples
+
+Where `␉` represents a tab (plus how much it expands) and `␠` represents a
+single space.
+
+```markdown
+␉
+␠␠␠␠
+␉␠
+```
+
+###### Parameters
+
+*   `effects` (`Effects`)
+    — context
+*   `ok` (`State`)
+    — state switched to when successful
+*   `type` (`string`)
+    — type (`' \t'`)
+*   `max` (`number`, default: `Infinity`)
+    — max (exclusive)
+
+###### Returns
+
+Start state (`State`).
+
+## Types
+
+This package is fully typed with [TypeScript][].
+It exports no additional types.
+
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line,
+`micromark-factory-space@^2`, compatible with Node.js 16.
+This package works with `micromark@^3`.
+
+## Security
+
+This package is safe.
+See [`security.md`][securitymd] in [`micromark/.github`][health] for how to
+submit a security report.
+
+## Contribute
+
+See [`contributing.md`][contributing] in [`micromark/.github`][health] for ways
+to get started.
+See [`support.md`][support] for ways to get help.
+
+This project has a [code of conduct][coc].
+By interacting with this repository, organisation, or community you agree to
+abide by its terms.
+
+## License
+
+[MIT][license] © [Titus Wormer][author]
+
+<!-- Definitions -->
+
+[build-badge]: https://github.com/micromark/micromark/workflows/main/badge.svg
+
+[build]: https://github.com/micromark/micromark/actions
+
+[coverage-badge]: https://img.shields.io/codecov/c/github/micromark/micromark.svg
+
+[coverage]: https://codecov.io/github/micromark/micromark
+
+[downloads-badge]: https://img.shields.io/npm/dm/micromark-factory-space.svg
+
+[downloads]: https://www.npmjs.com/package/micromark-factory-space
+
+[bundle-size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size&query=$.size.compressedSize&url=https://deno.bundlejs.com/?q=micromark-factory-space
+
+[bundle-size]: https://bundlejs.com/?q=micromark-factory-space
+
+[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg
+
+[backers-badge]: https://opencollective.com/unified/backers/badge.svg
+
+[opencollective]: https://opencollective.com/unified
+
+[npm]: https://docs.npmjs.com/cli/install
+
+[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
+
+[esmsh]: https://esm.sh
+
+[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg
+
+[chat]: https://github.com/micromark/micromark/discussions
+
+[license]: https://github.com/micromark/micromark/blob/main/license
+
+[author]: https://wooorm.com
+
+[health]: https://github.com/micromark/.github
+
+[securitymd]: https://github.com/micromark/.github/blob/main/security.md
+
+[contributing]: https://github.com/micromark/.github/blob/main/contributing.md
+
+[support]: https://github.com/micromark/.github/blob/main/support.md
+
+[coc]: https://github.com/micromark/.github/blob/main/code-of-conduct.md
+
+[markdown-space]: https://github.com/micromark/micromark/tree/main/packages/micromark-util-character#markdownspacecode
+
+[typescript]: https://www.typescriptlang.org
+
+[micromark]: https://github.com/micromark/micromark
+
+[api-factory-space]: #factoryspace

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-character/dev/index.d.ts

@@ -0,0 +1,64 @@
+/**
+ * Check whether a character code is an ASCII control character.
+ *
+ * An **ASCII control** is a character in the inclusive range U+0000 NULL (NUL)
+ * to U+001F (US), or U+007F (DEL).
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function asciiControl(code: Code): boolean;
+/**
+ * Check whether a character code is a markdown line ending.
+ *
+ * A **markdown line ending** is the virtual characters M-0003 CARRIAGE RETURN
+ * LINE FEED (CRLF), M-0004 LINE FEED (LF) and M-0005 CARRIAGE RETURN (CR).
+ *
+ * In micromark, the actual character U+000A LINE FEED (LF) and U+000D CARRIAGE
+ * RETURN (CR) are replaced by these virtual characters depending on whether
+ * they occurred together.
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function markdownLineEnding(code: Code): boolean;
+/**
+ * Check whether a character code is a markdown line ending (see
+ * `markdownLineEnding`) or markdown space (see `markdownSpace`).
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function markdownLineEndingOrSpace(code: Code): boolean;
+/**
+ * Check whether a character code is a markdown space.
+ *
+ * A **markdown space** is the concrete character U+0020 SPACE (SP) and the
+ * virtual characters M-0001 VIRTUAL SPACE (VS) and M-0002 HORIZONTAL TAB (HT).
+ *
+ * In micromark, the actual character U+0009 CHARACTER TABULATION (HT) is
+ * replaced by one M-0002 HORIZONTAL TAB (HT) and between 0 and 3 M-0001 VIRTUAL
+ * SPACE (VS) characters, depending on the column at which the tab occurred.
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function markdownSpace(code: Code): boolean;
+export function asciiAlpha(code: Code): boolean;
+export function asciiAlphanumeric(code: Code): boolean;
+export function asciiAtext(code: Code): boolean;
+export function asciiDigit(code: Code): boolean;
+export function asciiHexDigit(code: Code): boolean;
+export function asciiPunctuation(code: Code): boolean;
+export function unicodePunctuation(code: Code): boolean;
+export function unicodeWhitespace(code: Code): boolean;
+export type Code = import('micromark-util-types').Code;
+//# sourceMappingURL=index.d.ts.map

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-character/dev/index.d.ts.map

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node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-character/dev/index.js

@@ -0,0 +1,250 @@
+/**
+ * @typedef {import('micromark-util-types').Code} Code
+ */
+
+import {codes} from 'micromark-util-symbol'
+
+/**
+ * Check whether the character code represents an ASCII alpha (`a` through `z`,
+ * case insensitive).
+ *
+ * An **ASCII alpha** is an ASCII upper alpha or ASCII lower alpha.
+ *
+ * An **ASCII upper alpha** is a character in the inclusive range U+0041 (`A`)
+ * to U+005A (`Z`).
+ *
+ * An **ASCII lower alpha** is a character in the inclusive range U+0061 (`a`)
+ * to U+007A (`z`).
+ *
+ * @param code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export const asciiAlpha = regexCheck(/[A-Za-z]/)
+
+/**
+ * Check whether the character code represents an ASCII alphanumeric (`a`
+ * through `z`, case insensitive, or `0` through `9`).
+ *
+ * An **ASCII alphanumeric** is an ASCII digit (see `asciiDigit`) or ASCII alpha
+ * (see `asciiAlpha`).
+ *
+ * @param code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export const asciiAlphanumeric = regexCheck(/[\dA-Za-z]/)
+
+/**
+ * Check whether the character code represents an ASCII atext.
+ *
+ * atext is an ASCII alphanumeric (see `asciiAlphanumeric`), or a character in
+ * the inclusive ranges U+0023 NUMBER SIGN (`#`) to U+0027 APOSTROPHE (`'`),
+ * U+002A ASTERISK (`*`), U+002B PLUS SIGN (`+`), U+002D DASH (`-`), U+002F
+ * SLASH (`/`), U+003D EQUALS TO (`=`), U+003F QUESTION MARK (`?`), U+005E
+ * CARET (`^`) to U+0060 GRAVE ACCENT (`` ` ``), or U+007B LEFT CURLY BRACE
+ * (`{`) to U+007E TILDE (`~`).
+ *
+ * See:
+ * **\[RFC5322]**:
+ * [Internet Message Format](https://tools.ietf.org/html/rfc5322).
+ * P. Resnick.
+ * IETF.
+ *
+ * @param code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export const asciiAtext = regexCheck(/[#-'*+\--9=?A-Z^-~]/)
+
+/**
+ * Check whether a character code is an ASCII control character.
+ *
+ * An **ASCII control** is a character in the inclusive range U+0000 NULL (NUL)
+ * to U+001F (US), or U+007F (DEL).
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function asciiControl(code) {
+  return (
+    // Special whitespace codes (which have negative values), C0 and Control
+    // character DEL
+    code !== null && (code < codes.space || code === codes.del)
+  )
+}
+
+/**
+ * Check whether the character code represents an ASCII digit (`0` through `9`).
+ *
+ * An **ASCII digit** is a character in the inclusive range U+0030 (`0`) to
+ * U+0039 (`9`).
+ *
+ * @param code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export const asciiDigit = regexCheck(/\d/)
+
+/**
+ * Check whether the character code represents an ASCII hex digit (`a` through
+ * `f`, case insensitive, or `0` through `9`).
+ *
+ * An **ASCII hex digit** is an ASCII digit (see `asciiDigit`), ASCII upper hex
+ * digit, or an ASCII lower hex digit.
+ *
+ * An **ASCII upper hex digit** is a character in the inclusive range U+0041
+ * (`A`) to U+0046 (`F`).
+ *
+ * An **ASCII lower hex digit** is a character in the inclusive range U+0061
+ * (`a`) to U+0066 (`f`).
+ *
+ * @param code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export const asciiHexDigit = regexCheck(/[\dA-Fa-f]/)
+
+/**
+ * Check whether the character code represents ASCII punctuation.
+ *
+ * An **ASCII punctuation** is a character in the inclusive ranges U+0021
+ * EXCLAMATION MARK (`!`) to U+002F SLASH (`/`), U+003A COLON (`:`) to U+0040 AT
+ * SIGN (`@`), U+005B LEFT SQUARE BRACKET (`[`) to U+0060 GRAVE ACCENT
+ * (`` ` ``), or U+007B LEFT CURLY BRACE (`{`) to U+007E TILDE (`~`).
+ *
+ * @param code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export const asciiPunctuation = regexCheck(/[!-/:-@[-`{-~]/)
+
+/**
+ * Check whether a character code is a markdown line ending.
+ *
+ * A **markdown line ending** is the virtual characters M-0003 CARRIAGE RETURN
+ * LINE FEED (CRLF), M-0004 LINE FEED (LF) and M-0005 CARRIAGE RETURN (CR).
+ *
+ * In micromark, the actual character U+000A LINE FEED (LF) and U+000D CARRIAGE
+ * RETURN (CR) are replaced by these virtual characters depending on whether
+ * they occurred together.
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function markdownLineEnding(code) {
+  return code !== null && code < codes.horizontalTab
+}
+
+/**
+ * Check whether a character code is a markdown line ending (see
+ * `markdownLineEnding`) or markdown space (see `markdownSpace`).
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function markdownLineEndingOrSpace(code) {
+  return code !== null && (code < codes.nul || code === codes.space)
+}
+
+/**
+ * Check whether a character code is a markdown space.
+ *
+ * A **markdown space** is the concrete character U+0020 SPACE (SP) and the
+ * virtual characters M-0001 VIRTUAL SPACE (VS) and M-0002 HORIZONTAL TAB (HT).
+ *
+ * In micromark, the actual character U+0009 CHARACTER TABULATION (HT) is
+ * replaced by one M-0002 HORIZONTAL TAB (HT) and between 0 and 3 M-0001 VIRTUAL
+ * SPACE (VS) characters, depending on the column at which the tab occurred.
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function markdownSpace(code) {
+  return (
+    code === codes.horizontalTab ||
+    code === codes.virtualSpace ||
+    code === codes.space
+  )
+}
+
+// Size note: removing ASCII from the regex and using `asciiPunctuation` here
+// In fact adds to the bundle size.
+/**
+ * Check whether the character code represents Unicode punctuation.
+ *
+ * A **Unicode punctuation** is a character in the Unicode `Pc` (Punctuation,
+ * Connector), `Pd` (Punctuation, Dash), `Pe` (Punctuation, Close), `Pf`
+ * (Punctuation, Final quote), `Pi` (Punctuation, Initial quote), `Po`
+ * (Punctuation, Other), or `Ps` (Punctuation, Open) categories, or an ASCII
+ * punctuation (see `asciiPunctuation`).
+ *
+ * See:
+ * **\[UNICODE]**:
+ * [The Unicode Standard](https://www.unicode.org/versions/).
+ * Unicode Consortium.
+ *
+ * @param code
+ *   Code.
+ * @returns
+ *   Whether it matches.
+ */
+export const unicodePunctuation = regexCheck(/\p{P}|\p{S}/u)
+
+/**
+ * Check whether the character code represents Unicode whitespace.
+ *
+ * Note that this does handle micromark specific markdown whitespace characters.
+ * See `markdownLineEndingOrSpace` to check that.
+ *
+ * A **Unicode whitespace** is a character in the Unicode `Zs` (Separator,
+ * Space) category, or U+0009 CHARACTER TABULATION (HT), U+000A LINE FEED (LF),
+ * U+000C (FF), or U+000D CARRIAGE RETURN (CR) (**\[UNICODE]**).
+ *
+ * See:
+ * **\[UNICODE]**:
+ * [The Unicode Standard](https://www.unicode.org/versions/).
+ * Unicode Consortium.
+ *
+ * @param code
+ *   Code.
+ * @returns
+ *   Whether it matches.
+ */
+export const unicodeWhitespace = regexCheck(/\s/)
+
+/**
+ * Create a code check from a regex.
+ *
+ * @param {RegExp} regex
+ * @returns {(code: Code) => boolean}
+ */
+function regexCheck(regex) {
+  return check
+
+  /**
+   * Check whether a code matches the bound regex.
+   *
+   * @param {Code} code
+   *   Character code.
+   * @returns {boolean}
+   *   Whether the character code matches the bound regex.
+   */
+  function check(code) {
+    return code !== null && code > -1 && regex.test(String.fromCharCode(code))
+  }
+}

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-character/index.d.ts

@@ -0,0 +1,64 @@
+/**
+ * Check whether a character code is an ASCII control character.
+ *
+ * An **ASCII control** is a character in the inclusive range U+0000 NULL (NUL)
+ * to U+001F (US), or U+007F (DEL).
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function asciiControl(code: Code): boolean;
+/**
+ * Check whether a character code is a markdown line ending.
+ *
+ * A **markdown line ending** is the virtual characters M-0003 CARRIAGE RETURN
+ * LINE FEED (CRLF), M-0004 LINE FEED (LF) and M-0005 CARRIAGE RETURN (CR).
+ *
+ * In micromark, the actual character U+000A LINE FEED (LF) and U+000D CARRIAGE
+ * RETURN (CR) are replaced by these virtual characters depending on whether
+ * they occurred together.
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function markdownLineEnding(code: Code): boolean;
+/**
+ * Check whether a character code is a markdown line ending (see
+ * `markdownLineEnding`) or markdown space (see `markdownSpace`).
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function markdownLineEndingOrSpace(code: Code): boolean;
+/**
+ * Check whether a character code is a markdown space.
+ *
+ * A **markdown space** is the concrete character U+0020 SPACE (SP) and the
+ * virtual characters M-0001 VIRTUAL SPACE (VS) and M-0002 HORIZONTAL TAB (HT).
+ *
+ * In micromark, the actual character U+0009 CHARACTER TABULATION (HT) is
+ * replaced by one M-0002 HORIZONTAL TAB (HT) and between 0 and 3 M-0001 VIRTUAL
+ * SPACE (VS) characters, depending on the column at which the tab occurred.
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function markdownSpace(code: Code): boolean;
+export function asciiAlpha(code: Code): boolean;
+export function asciiAlphanumeric(code: Code): boolean;
+export function asciiAtext(code: Code): boolean;
+export function asciiDigit(code: Code): boolean;
+export function asciiHexDigit(code: Code): boolean;
+export function asciiPunctuation(code: Code): boolean;
+export function unicodePunctuation(code: Code): boolean;
+export function unicodeWhitespace(code: Code): boolean;
+export type Code = import('micromark-util-types').Code;
+//# sourceMappingURL=index.d.ts.map

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-character/index.d.ts.map

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node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-character/index.js

@@ -0,0 +1,244 @@
+/**
+ * @typedef {import('micromark-util-types').Code} Code
+ */
+
+/**
+ * Check whether the character code represents an ASCII alpha (`a` through `z`,
+ * case insensitive).
+ *
+ * An **ASCII alpha** is an ASCII upper alpha or ASCII lower alpha.
+ *
+ * An **ASCII upper alpha** is a character in the inclusive range U+0041 (`A`)
+ * to U+005A (`Z`).
+ *
+ * An **ASCII lower alpha** is a character in the inclusive range U+0061 (`a`)
+ * to U+007A (`z`).
+ *
+ * @param code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export const asciiAlpha = regexCheck(/[A-Za-z]/);
+
+/**
+ * Check whether the character code represents an ASCII alphanumeric (`a`
+ * through `z`, case insensitive, or `0` through `9`).
+ *
+ * An **ASCII alphanumeric** is an ASCII digit (see `asciiDigit`) or ASCII alpha
+ * (see `asciiAlpha`).
+ *
+ * @param code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export const asciiAlphanumeric = regexCheck(/[\dA-Za-z]/);
+
+/**
+ * Check whether the character code represents an ASCII atext.
+ *
+ * atext is an ASCII alphanumeric (see `asciiAlphanumeric`), or a character in
+ * the inclusive ranges U+0023 NUMBER SIGN (`#`) to U+0027 APOSTROPHE (`'`),
+ * U+002A ASTERISK (`*`), U+002B PLUS SIGN (`+`), U+002D DASH (`-`), U+002F
+ * SLASH (`/`), U+003D EQUALS TO (`=`), U+003F QUESTION MARK (`?`), U+005E
+ * CARET (`^`) to U+0060 GRAVE ACCENT (`` ` ``), or U+007B LEFT CURLY BRACE
+ * (`{`) to U+007E TILDE (`~`).
+ *
+ * See:
+ * **\[RFC5322]**:
+ * [Internet Message Format](https://tools.ietf.org/html/rfc5322).
+ * P. Resnick.
+ * IETF.
+ *
+ * @param code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export const asciiAtext = regexCheck(/[#-'*+\--9=?A-Z^-~]/);
+
+/**
+ * Check whether a character code is an ASCII control character.
+ *
+ * An **ASCII control** is a character in the inclusive range U+0000 NULL (NUL)
+ * to U+001F (US), or U+007F (DEL).
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function asciiControl(code) {
+  return (
+    // Special whitespace codes (which have negative values), C0 and Control
+    // character DEL
+    code !== null && (code < 32 || code === 127)
+  );
+}
+
+/**
+ * Check whether the character code represents an ASCII digit (`0` through `9`).
+ *
+ * An **ASCII digit** is a character in the inclusive range U+0030 (`0`) to
+ * U+0039 (`9`).
+ *
+ * @param code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export const asciiDigit = regexCheck(/\d/);
+
+/**
+ * Check whether the character code represents an ASCII hex digit (`a` through
+ * `f`, case insensitive, or `0` through `9`).
+ *
+ * An **ASCII hex digit** is an ASCII digit (see `asciiDigit`), ASCII upper hex
+ * digit, or an ASCII lower hex digit.
+ *
+ * An **ASCII upper hex digit** is a character in the inclusive range U+0041
+ * (`A`) to U+0046 (`F`).
+ *
+ * An **ASCII lower hex digit** is a character in the inclusive range U+0061
+ * (`a`) to U+0066 (`f`).
+ *
+ * @param code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export const asciiHexDigit = regexCheck(/[\dA-Fa-f]/);
+
+/**
+ * Check whether the character code represents ASCII punctuation.
+ *
+ * An **ASCII punctuation** is a character in the inclusive ranges U+0021
+ * EXCLAMATION MARK (`!`) to U+002F SLASH (`/`), U+003A COLON (`:`) to U+0040 AT
+ * SIGN (`@`), U+005B LEFT SQUARE BRACKET (`[`) to U+0060 GRAVE ACCENT
+ * (`` ` ``), or U+007B LEFT CURLY BRACE (`{`) to U+007E TILDE (`~`).
+ *
+ * @param code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export const asciiPunctuation = regexCheck(/[!-/:-@[-`{-~]/);
+
+/**
+ * Check whether a character code is a markdown line ending.
+ *
+ * A **markdown line ending** is the virtual characters M-0003 CARRIAGE RETURN
+ * LINE FEED (CRLF), M-0004 LINE FEED (LF) and M-0005 CARRIAGE RETURN (CR).
+ *
+ * In micromark, the actual character U+000A LINE FEED (LF) and U+000D CARRIAGE
+ * RETURN (CR) are replaced by these virtual characters depending on whether
+ * they occurred together.
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function markdownLineEnding(code) {
+  return code !== null && code < -2;
+}
+
+/**
+ * Check whether a character code is a markdown line ending (see
+ * `markdownLineEnding`) or markdown space (see `markdownSpace`).
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function markdownLineEndingOrSpace(code) {
+  return code !== null && (code < 0 || code === 32);
+}
+
+/**
+ * Check whether a character code is a markdown space.
+ *
+ * A **markdown space** is the concrete character U+0020 SPACE (SP) and the
+ * virtual characters M-0001 VIRTUAL SPACE (VS) and M-0002 HORIZONTAL TAB (HT).
+ *
+ * In micromark, the actual character U+0009 CHARACTER TABULATION (HT) is
+ * replaced by one M-0002 HORIZONTAL TAB (HT) and between 0 and 3 M-0001 VIRTUAL
+ * SPACE (VS) characters, depending on the column at which the tab occurred.
+ *
+ * @param {Code} code
+ *   Code.
+ * @returns {boolean}
+ *   Whether it matches.
+ */
+export function markdownSpace(code) {
+  return code === -2 || code === -1 || code === 32;
+}
+
+// Size note: removing ASCII from the regex and using `asciiPunctuation` here
+// In fact adds to the bundle size.
+/**
+ * Check whether the character code represents Unicode punctuation.
+ *
+ * A **Unicode punctuation** is a character in the Unicode `Pc` (Punctuation,
+ * Connector), `Pd` (Punctuation, Dash), `Pe` (Punctuation, Close), `Pf`
+ * (Punctuation, Final quote), `Pi` (Punctuation, Initial quote), `Po`
+ * (Punctuation, Other), or `Ps` (Punctuation, Open) categories, or an ASCII
+ * punctuation (see `asciiPunctuation`).
+ *
+ * See:
+ * **\[UNICODE]**:
+ * [The Unicode Standard](https://www.unicode.org/versions/).
+ * Unicode Consortium.
+ *
+ * @param code
+ *   Code.
+ * @returns
+ *   Whether it matches.
+ */
+export const unicodePunctuation = regexCheck(/\p{P}|\p{S}/u);
+
+/**
+ * Check whether the character code represents Unicode whitespace.
+ *
+ * Note that this does handle micromark specific markdown whitespace characters.
+ * See `markdownLineEndingOrSpace` to check that.
+ *
+ * A **Unicode whitespace** is a character in the Unicode `Zs` (Separator,
+ * Space) category, or U+0009 CHARACTER TABULATION (HT), U+000A LINE FEED (LF),
+ * U+000C (FF), or U+000D CARRIAGE RETURN (CR) (**\[UNICODE]**).
+ *
+ * See:
+ * **\[UNICODE]**:
+ * [The Unicode Standard](https://www.unicode.org/versions/).
+ * Unicode Consortium.
+ *
+ * @param code
+ *   Code.
+ * @returns
+ *   Whether it matches.
+ */
+export const unicodeWhitespace = regexCheck(/\s/);
+
+/**
+ * Create a code check from a regex.
+ *
+ * @param {RegExp} regex
+ * @returns {(code: Code) => boolean}
+ */
+function regexCheck(regex) {
+  return check;
+
+  /**
+   * Check whether a code matches the bound regex.
+   *
+   * @param {Code} code
+   *   Character code.
+   * @returns {boolean}
+   *   Whether the character code matches the bound regex.
+   */
+  function check(code) {
+    return code !== null && code > -1 && regex.test(String.fromCharCode(code));
+  }
+}

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-character/package.json

@@ -0,0 +1,57 @@
+{
+  "name": "micromark-util-character",
+  "version": "2.1.0",
+  "description": "micromark utility to handle character codes",
+  "license": "MIT",
+  "keywords": [
+    "micromark",
+    "util",
+    "utility",
+    "character"
+  ],
+  "repository": "https://github.com/micromark/micromark/tree/main/packages/micromark-util-character",
+  "bugs": "https://github.com/micromark/micromark/issues",
+  "funding": [
+    {
+      "type": "GitHub Sponsors",
+      "url": "https://github.com/sponsors/unifiedjs"
+    },
+    {
+      "type": "OpenCollective",
+      "url": "https://opencollective.com/unified"
+    }
+  ],
+  "author": "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)",
+  "contributors": [
+    "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
+  ],
+  "sideEffects": false,
+  "type": "module",
+  "files": [
+    "dev/",
+    "lib/",
+    "index.d.ts.map",
+    "index.d.ts",
+    "index.js"
+  ],
+  "exports": {
+    "development": "./dev/index.js",
+    "default": "./index.js"
+  },
+  "dependencies": {
+    "micromark-util-symbol": "^2.0.0",
+    "micromark-util-types": "^2.0.0"
+  },
+  "scripts": {
+    "build": "micromark-build"
+  },
+  "xo": {
+    "envs": [
+      "shared-node-browser"
+    ],
+    "prettier": true,
+    "rules": {
+      "unicorn/prefer-code-point": "off"
+    }
+  }
+}

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-character/readme.md

@@ -0,0 +1,446 @@
+# micromark-util-character
+
+[![Build][build-badge]][build]
+[![Coverage][coverage-badge]][coverage]
+[![Downloads][downloads-badge]][downloads]
+[![Size][bundle-size-badge]][bundle-size]
+[![Sponsors][sponsors-badge]][opencollective]
+[![Backers][backers-badge]][opencollective]
+[![Chat][chat-badge]][chat]
+
+[micromark][] utility to handle [character codes][code].
+
+## Contents
+
+*   [What is this?](#what-is-this)
+*   [When should I use this?](#when-should-i-use-this)
+*   [Install](#install)
+*   [Use](#use)
+*   [API](#api)
+    *   [`asciiAlpha(code)`](#asciialphacode)
+    *   [`asciiAlphanumeric(code)`](#asciialphanumericcode)
+    *   [`asciiAtext(code)`](#asciiatextcode)
+    *   [`asciiControl(code)`](#asciicontrolcode)
+    *   [`asciiDigit(code)`](#asciidigitcode)
+    *   [`asciiHexDigit(code)`](#asciihexdigitcode)
+    *   [`asciiPunctuation(code)`](#asciipunctuationcode)
+    *   [`markdownLineEnding(code)`](#markdownlineendingcode)
+    *   [`markdownLineEndingOrSpace(code)`](#markdownlineendingorspacecode)
+    *   [`markdownSpace(code)`](#markdownspacecode)
+    *   [`unicodePunctuation(code)`](#unicodepunctuationcode)
+    *   [`unicodeWhitespace(code)`](#unicodewhitespacecode)
+*   [Types](#types)
+*   [Compatibility](#compatibility)
+*   [Security](#security)
+*   [Contribute](#contribute)
+*   [License](#license)
+
+## What is this?
+
+This package exposes algorithms to check whether characters match groups.
+
+## When should I use this?
+
+This package might be useful when you are making your own micromark extensions.
+
+## Install
+
+This package is [ESM only][esm].
+In Node.js (version 16+), install with [npm][]:
+
+```sh
+npm install micromark-util-character
+```
+
+In Deno with [`esm.sh`][esmsh]:
+
+```js
+import * as character from 'https://esm.sh/micromark-util-character@1'
+```
+
+In browsers with [`esm.sh`][esmsh]:
+
+```html
+<script type="module">
+  import * as character from 'https://esm.sh/micromark-util-character@1?bundle'
+</script>
+```
+
+## Use
+
+```js
+import {asciiAlpha} from 'micromark-util-character'
+
+console.log(asciiAlpha(64)) // false
+console.log(asciiAlpha(65)) // true
+```
+
+## API
+
+This module exports the identifiers
+[`asciiAlpha`][api-ascii-alpha],
+[`asciiAlphanumeric`][api-ascii-alphanumeric],
+[`asciiAtext`][api-ascii-atext],
+[`asciiControl`][api-ascii-control],
+[`asciiDigit`][api-ascii-digit],
+[`asciiHexDigit`][api-ascii-hex-digit],
+[`asciiPunctuation`][api-ascii-punctuation],
+[`markdownLineEnding`][api-markdown-line-ending],
+[`markdownLineEndingOrSpace`][api-markdown-line-ending-or-space],
+[`markdownSpace`][api-markdown-space],
+[`unicodePunctuation`][api-unicode-punctuation],
+[`unicodeWhitespace`][api-unicode-whitespace].
+There is no default export.
+
+### `asciiAlpha(code)`
+
+Check whether the [character code][code] represents an ASCII alpha (`a` through
+`z`, case insensitive).
+
+An **ASCII alpha** is an ASCII upper alpha or ASCII lower alpha.
+
+An **ASCII upper alpha** is a character in the inclusive range U+0041 (`A`)
+to U+005A (`Z`).
+
+An **ASCII lower alpha** is a character in the inclusive range U+0061 (`a`)
+to U+007A (`z`).
+
+###### Parameters
+
+*   `code` (`Code`)
+    — code
+
+###### Returns
+
+Whether it matches (`boolean`).
+
+### `asciiAlphanumeric(code)`
+
+Check whether the [character code][code] represents an ASCII alphanumeric (`a`
+through `z`, case insensitive, or `0` through `9`).
+
+An **ASCII alphanumeric** is an ASCII digit (see `asciiDigit`) or ASCII alpha
+(see `asciiAlpha`).
+
+###### Parameters
+
+*   `code` (`Code`)
+    — code
+
+###### Returns
+
+Whether it matches (`boolean`).
+
+### `asciiAtext(code)`
+
+Check whether the [character code][code] represents an ASCII atext.
+
+atext is an ASCII alphanumeric (see `asciiAlphanumeric`), or a character in
+the inclusive ranges U+0023 NUMBER SIGN (`#`) to U+0027 APOSTROPHE (`'`),
+U+002A ASTERISK (`*`), U+002B PLUS SIGN (`+`), U+002D DASH (`-`), U+002F
+SLASH (`/`), U+003D EQUALS TO (`=`), U+003F QUESTION MARK (`?`), U+005E
+CARET (`^`) to U+0060 GRAVE ACCENT (`` ` ``), or U+007B LEFT CURLY BRACE
+(`{`) to U+007E TILDE (`~`) (**\[RFC5322]**).
+
+See **\[RFC5322]**:\
+[Internet Message Format](https://tools.ietf.org/html/rfc5322).\
+P. Resnick.\
+IETF.
+
+###### Parameters
+
+*   `code` (`Code`)
+    — code
+
+###### Returns
+
+Whether it matches (`boolean`).
+
+### `asciiControl(code)`
+
+Check whether a [character code][code] is an ASCII control character.
+
+An **ASCII control** is a character in the inclusive range U+0000 NULL (NUL)
+to U+001F (US), or U+007F (DEL).
+
+###### Parameters
+
+*   `code` (`Code`)
+    — code
+
+###### Returns
+
+Whether it matches (`boolean`).
+
+### `asciiDigit(code)`
+
+Check whether the [character code][code] represents an ASCII digit (`0` through
+`9`).
+
+An **ASCII digit** is a character in the inclusive range U+0030 (`0`) to
+U+0039 (`9`).
+
+###### Parameters
+
+*   `code` (`Code`)
+    — code
+
+###### Returns
+
+Whether it matches (`boolean`).
+
+### `asciiHexDigit(code)`
+
+Check whether the [character code][code] represents an ASCII hex digit (`a`
+through `f`, case insensitive, or `0` through `9`).
+
+An **ASCII hex digit** is an ASCII digit (see `asciiDigit`), ASCII upper hex
+digit, or an ASCII lower hex digit.
+
+An **ASCII upper hex digit** is a character in the inclusive range U+0041
+(`A`) to U+0046 (`F`).
+
+An **ASCII lower hex digit** is a character in the inclusive range U+0061
+(`a`) to U+0066 (`f`).
+
+###### Parameters
+
+*   `code` (`Code`)
+    — code
+
+###### Returns
+
+Whether it matches (`boolean`).
+
+### `asciiPunctuation(code)`
+
+Check whether the [character code][code] represents ASCII punctuation.
+
+An **ASCII punctuation** is a character in the inclusive ranges U+0021
+EXCLAMATION MARK (`!`) to U+002F SLASH (`/`), U+003A COLON (`:`) to U+0040 AT
+SIGN (`@`), U+005B LEFT SQUARE BRACKET (`[`) to U+0060 GRAVE ACCENT
+(`` ` ``), or U+007B LEFT CURLY BRACE (`{`) to U+007E TILDE (`~`).
+
+###### Parameters
+
+*   `code` (`Code`)
+    — code
+
+###### Returns
+
+Whether it matches (`boolean`).
+
+### `markdownLineEnding(code)`
+
+Check whether a [character code][code] is a markdown line ending.
+
+A **markdown line ending** is the virtual characters M-0003 CARRIAGE RETURN
+LINE FEED (CRLF), M-0004 LINE FEED (LF) and M-0005 CARRIAGE RETURN (CR).
+
+In micromark, the actual character U+000A LINE FEED (LF) and U+000D CARRIAGE
+RETURN (CR) are replaced by these virtual characters depending on whether
+they occurred together.
+
+###### Parameters
+
+*   `code` (`Code`)
+    — code
+
+###### Returns
+
+Whether it matches (`boolean`).
+
+### `markdownLineEndingOrSpace(code)`
+
+Check whether a [character code][code] is a markdown line ending (see
+`markdownLineEnding`) or markdown space (see `markdownSpace`).
+
+###### Parameters
+
+*   `code` (`Code`)
+    — code
+
+###### Returns
+
+Whether it matches (`boolean`).
+
+### `markdownSpace(code)`
+
+Check whether a [character code][code] is a markdown space.
+
+A **markdown space** is the concrete character U+0020 SPACE (SP) and the
+virtual characters M-0001 VIRTUAL SPACE (VS) and M-0002 HORIZONTAL TAB (HT).
+
+In micromark, the actual character U+0009 CHARACTER TABULATION (HT) is
+replaced by one M-0002 HORIZONTAL TAB (HT) and between 0 and 3 M-0001 VIRTUAL
+SPACE (VS) characters, depending on the column at which the tab occurred.
+
+###### Parameters
+
+*   `code` (`Code`)
+    — code
+
+###### Returns
+
+Whether it matches (`boolean`).
+
+### `unicodePunctuation(code)`
+
+Check whether the [character code][code] represents Unicode punctuation.
+
+A **Unicode punctuation** is a character in the Unicode `Pc` (Punctuation,
+Connector), `Pd` (Punctuation, Dash), `Pe` (Punctuation, Close), `Pf`
+(Punctuation, Final quote), `Pi` (Punctuation, Initial quote), `Po`
+(Punctuation, Other), or `Ps` (Punctuation, Open) categories, or an ASCII
+punctuation (see `asciiPunctuation`) (**\[UNICODE]**).
+
+See **\[UNICODE]**:\
+[The Unicode Standard](https://www.unicode.org/versions/).\
+Unicode Consortium.
+
+###### Parameters
+
+*   `code` (`Code`)
+    — code
+
+###### Returns
+
+Whether it matches (`boolean`).
+
+### `unicodeWhitespace(code)`
+
+Check whether the [character code][code] represents Unicode whitespace.
+
+Note that this does handle micromark specific markdown whitespace characters.
+See `markdownLineEndingOrSpace` to check that.
+
+A **Unicode whitespace** is a character in the Unicode `Zs` (Separator,
+Space) category, or U+0009 CHARACTER TABULATION (HT), U+000A LINE FEED (LF),
+U+000C (FF), or U+000D CARRIAGE RETURN (CR) (**\[UNICODE]**).
+
+See **\[UNICODE]**:\
+[The Unicode Standard](https://www.unicode.org/versions/).\
+Unicode Consortium.
+
+###### Parameters
+
+*   `code` (`Code`)
+    — code
+
+###### Returns
+
+Whether it matches (`boolean`).
+
+## Types
+
+This package is fully typed with [TypeScript][].
+It exports no additional types.
+
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line,
+`micromark-util-character@^2`, compatible with Node.js 16.
+This package works with `micromark@^3`.
+
+## Security
+
+This package is safe.
+See [`security.md`][securitymd] in [`micromark/.github`][health] for how to
+submit a security report.
+
+## Contribute
+
+See [`contributing.md`][contributing] in [`micromark/.github`][health] for ways
+to get started.
+See [`support.md`][support] for ways to get help.
+
+This project has a [code of conduct][coc].
+By interacting with this repository, organisation, or community you agree to
+abide by its terms.
+
+## License
+
+[MIT][license] © [Titus Wormer][author]
+
+<!-- Definitions -->
+
+[build-badge]: https://github.com/micromark/micromark/workflows/main/badge.svg
+
+[build]: https://github.com/micromark/micromark/actions
+
+[coverage-badge]: https://img.shields.io/codecov/c/github/micromark/micromark.svg
+
+[coverage]: https://codecov.io/github/micromark/micromark
+
+[downloads-badge]: https://img.shields.io/npm/dm/micromark-util-character.svg
+
+[downloads]: https://www.npmjs.com/package/micromark-util-character
+
+[bundle-size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size&query=$.size.compressedSize&url=https://deno.bundlejs.com/?q=micromark-util-character
+
+[bundle-size]: https://bundlejs.com/?q=micromark-util-character
+
+[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg
+
+[backers-badge]: https://opencollective.com/unified/backers/badge.svg
+
+[opencollective]: https://opencollective.com/unified
+
+[npm]: https://docs.npmjs.com/cli/install
+
+[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
+
+[esmsh]: https://esm.sh
+
+[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg
+
+[chat]: https://github.com/micromark/micromark/discussions
+
+[license]: https://github.com/micromark/micromark/blob/main/license
+
+[author]: https://wooorm.com
+
+[health]: https://github.com/micromark/.github
+
+[securitymd]: https://github.com/micromark/.github/blob/main/security.md
+
+[contributing]: https://github.com/micromark/.github/blob/main/contributing.md
+
+[support]: https://github.com/micromark/.github/blob/main/support.md
+
+[coc]: https://github.com/micromark/.github/blob/main/code-of-conduct.md
+
+[typescript]: https://www.typescriptlang.org
+
+[micromark]: https://github.com/micromark/micromark
+
+[code]: https://github.com/micromark/micromark#preprocess
+
+[api-ascii-alpha]: #asciialphacode
+
+[api-ascii-alphanumeric]: #asciialphanumericcode
+
+[api-ascii-atext]: #asciiatextcode
+
+[api-ascii-control]: #asciicontrolcode
+
+[api-ascii-digit]: #asciidigitcode
+
+[api-ascii-hex-digit]: #asciihexdigitcode
+
+[api-ascii-punctuation]: #asciipunctuationcode
+
+[api-markdown-line-ending]: #markdownlineendingcode
+
+[api-markdown-line-ending-or-space]: #markdownlineendingorspacecode
+
+[api-markdown-space]: #markdownspacecode
+
+[api-unicode-punctuation]: #unicodepunctuationcode
+
+[api-unicode-whitespace]: #unicodewhitespacecode

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-symbol/lib/codes.d.ts

@@ -0,0 +1,138 @@
+export namespace codes {
+  let carriageReturn: -5
+  let lineFeed: -4
+  let carriageReturnLineFeed: -3
+  let horizontalTab: -2
+  let virtualSpace: -1
+  let eof: null
+  let nul: 0
+  let soh: 1
+  let stx: 2
+  let etx: 3
+  let eot: 4
+  let enq: 5
+  let ack: 6
+  let bel: 7
+  let bs: 8
+  let ht: 9
+  let lf: 10
+  let vt: 11
+  let ff: 12
+  let cr: 13
+  let so: 14
+  let si: 15
+  let dle: 16
+  let dc1: 17
+  let dc2: 18
+  let dc3: 19
+  let dc4: 20
+  let nak: 21
+  let syn: 22
+  let etb: 23
+  let can: 24
+  let em: 25
+  let sub: 26
+  let esc: 27
+  let fs: 28
+  let gs: 29
+  let rs: 30
+  let us: 31
+  let space: 32
+  let exclamationMark: 33
+  let quotationMark: 34
+  let numberSign: 35
+  let dollarSign: 36
+  let percentSign: 37
+  let ampersand: 38
+  let apostrophe: 39
+  let leftParenthesis: 40
+  let rightParenthesis: 41
+  let asterisk: 42
+  let plusSign: 43
+  let comma: 44
+  let dash: 45
+  let dot: 46
+  let slash: 47
+  let digit0: 48
+  let digit1: 49
+  let digit2: 50
+  let digit3: 51
+  let digit4: 52
+  let digit5: 53
+  let digit6: 54
+  let digit7: 55
+  let digit8: 56
+  let digit9: 57
+  let colon: 58
+  let semicolon: 59
+  let lessThan: 60
+  let equalsTo: 61
+  let greaterThan: 62
+  let questionMark: 63
+  let atSign: 64
+  let uppercaseA: 65
+  let uppercaseB: 66
+  let uppercaseC: 67
+  let uppercaseD: 68
+  let uppercaseE: 69
+  let uppercaseF: 70
+  let uppercaseG: 71
+  let uppercaseH: 72
+  let uppercaseI: 73
+  let uppercaseJ: 74
+  let uppercaseK: 75
+  let uppercaseL: 76
+  let uppercaseM: 77
+  let uppercaseN: 78
+  let uppercaseO: 79
+  let uppercaseP: 80
+  let uppercaseQ: 81
+  let uppercaseR: 82
+  let uppercaseS: 83
+  let uppercaseT: 84
+  let uppercaseU: 85
+  let uppercaseV: 86
+  let uppercaseW: 87
+  let uppercaseX: 88
+  let uppercaseY: 89
+  let uppercaseZ: 90
+  let leftSquareBracket: 91
+  let backslash: 92
+  let rightSquareBracket: 93
+  let caret: 94
+  let underscore: 95
+  let graveAccent: 96
+  let lowercaseA: 97
+  let lowercaseB: 98
+  let lowercaseC: 99
+  let lowercaseD: 100
+  let lowercaseE: 101
+  let lowercaseF: 102
+  let lowercaseG: 103
+  let lowercaseH: 104
+  let lowercaseI: 105
+  let lowercaseJ: 106
+  let lowercaseK: 107
+  let lowercaseL: 108
+  let lowercaseM: 109
+  let lowercaseN: 110
+  let lowercaseO: 111
+  let lowercaseP: 112
+  let lowercaseQ: 113
+  let lowercaseR: 114
+  let lowercaseS: 115
+  let lowercaseT: 116
+  let lowercaseU: 117
+  let lowercaseV: 118
+  let lowercaseW: 119
+  let lowercaseX: 120
+  let lowercaseY: 121
+  let lowercaseZ: 122
+  let leftCurlyBrace: 123
+  let verticalBar: 124
+  let rightCurlyBrace: 125
+  let tilde: 126
+  let del: 127
+  let byteOrderMarker: 65279
+  let replacementCharacter: 65533
+}

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-symbol/lib/codes.js

@@ -0,0 +1,158 @@
+/**
+ * Character codes.
+ *
+ * This module is compiled away!
+ *
+ * micromark works based on character codes.
+ * This module contains constants for the ASCII block and the replacement
+ * character.
+ * A couple of them are handled in a special way, such as the line endings
+ * (CR, LF, and CR+LF, commonly known as end-of-line: EOLs), the tab (horizontal
+ * tab) and its expansion based on what column it’s at (virtual space),
+ * and the end-of-file (eof) character.
+ * As values are preprocessed before handling them, the actual characters LF,
+ * CR, HT, and NUL (which is present as the replacement character), are
+ * guaranteed to not exist.
+ *
+ * Unicode basic latin block.
+ */
+export const codes = /** @type {const} */ ({
+  carriageReturn: -5,
+  lineFeed: -4,
+  carriageReturnLineFeed: -3,
+  horizontalTab: -2,
+  virtualSpace: -1,
+  eof: null,
+  nul: 0,
+  soh: 1,
+  stx: 2,
+  etx: 3,
+  eot: 4,
+  enq: 5,
+  ack: 6,
+  bel: 7,
+  bs: 8,
+  ht: 9, // `\t`
+  lf: 10, // `\n`
+  vt: 11, // `\v`
+  ff: 12, // `\f`
+  cr: 13, // `\r`
+  so: 14,
+  si: 15,
+  dle: 16,
+  dc1: 17,
+  dc2: 18,
+  dc3: 19,
+  dc4: 20,
+  nak: 21,
+  syn: 22,
+  etb: 23,
+  can: 24,
+  em: 25,
+  sub: 26,
+  esc: 27,
+  fs: 28,
+  gs: 29,
+  rs: 30,
+  us: 31,
+  space: 32,
+  exclamationMark: 33, // `!`
+  quotationMark: 34, // `"`
+  numberSign: 35, // `#`
+  dollarSign: 36, // `$`
+  percentSign: 37, // `%`
+  ampersand: 38, // `&`
+  apostrophe: 39, // `'`
+  leftParenthesis: 40, // `(`
+  rightParenthesis: 41, // `)`
+  asterisk: 42, // `*`
+  plusSign: 43, // `+`
+  comma: 44, // `,`
+  dash: 45, // `-`
+  dot: 46, // `.`
+  slash: 47, // `/`
+  digit0: 48, // `0`
+  digit1: 49, // `1`
+  digit2: 50, // `2`
+  digit3: 51, // `3`
+  digit4: 52, // `4`
+  digit5: 53, // `5`
+  digit6: 54, // `6`
+  digit7: 55, // `7`
+  digit8: 56, // `8`
+  digit9: 57, // `9`
+  colon: 58, // `:`
+  semicolon: 59, // `;`
+  lessThan: 60, // `<`
+  equalsTo: 61, // `=`
+  greaterThan: 62, // `>`
+  questionMark: 63, // `?`
+  atSign: 64, // `@`
+  uppercaseA: 65, // `A`
+  uppercaseB: 66, // `B`
+  uppercaseC: 67, // `C`
+  uppercaseD: 68, // `D`
+  uppercaseE: 69, // `E`
+  uppercaseF: 70, // `F`
+  uppercaseG: 71, // `G`
+  uppercaseH: 72, // `H`
+  uppercaseI: 73, // `I`
+  uppercaseJ: 74, // `J`
+  uppercaseK: 75, // `K`
+  uppercaseL: 76, // `L`
+  uppercaseM: 77, // `M`
+  uppercaseN: 78, // `N`
+  uppercaseO: 79, // `O`
+  uppercaseP: 80, // `P`
+  uppercaseQ: 81, // `Q`
+  uppercaseR: 82, // `R`
+  uppercaseS: 83, // `S`
+  uppercaseT: 84, // `T`
+  uppercaseU: 85, // `U`
+  uppercaseV: 86, // `V`
+  uppercaseW: 87, // `W`
+  uppercaseX: 88, // `X`
+  uppercaseY: 89, // `Y`
+  uppercaseZ: 90, // `Z`
+  leftSquareBracket: 91, // `[`
+  backslash: 92, // `\`
+  rightSquareBracket: 93, // `]`
+  caret: 94, // `^`
+  underscore: 95, // `_`
+  graveAccent: 96, // `` ` ``
+  lowercaseA: 97, // `a`
+  lowercaseB: 98, // `b`
+  lowercaseC: 99, // `c`
+  lowercaseD: 100, // `d`
+  lowercaseE: 101, // `e`
+  lowercaseF: 102, // `f`
+  lowercaseG: 103, // `g`
+  lowercaseH: 104, // `h`
+  lowercaseI: 105, // `i`
+  lowercaseJ: 106, // `j`
+  lowercaseK: 107, // `k`
+  lowercaseL: 108, // `l`
+  lowercaseM: 109, // `m`
+  lowercaseN: 110, // `n`
+  lowercaseO: 111, // `o`
+  lowercaseP: 112, // `p`
+  lowercaseQ: 113, // `q`
+  lowercaseR: 114, // `r`
+  lowercaseS: 115, // `s`
+  lowercaseT: 116, // `t`
+  lowercaseU: 117, // `u`
+  lowercaseV: 118, // `v`
+  lowercaseW: 119, // `w`
+  lowercaseX: 120, // `x`
+  lowercaseY: 121, // `y`
+  lowercaseZ: 122, // `z`
+  leftCurlyBrace: 123, // `{`
+  verticalBar: 124, // `|`
+  rightCurlyBrace: 125, // `}`
+  tilde: 126, // `~`
+  del: 127,
+  // Unicode Specials block.
+  byteOrderMarker: 65279,
+  // Unicode Specials block.
+  replacementCharacter: 65533 // `<60>`
+})

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-symbol/lib/constants.d.ts

@@ -0,0 +1,36 @@
+export namespace constants {
+  let attentionSideBefore: 1
+  let attentionSideAfter: 2
+  let atxHeadingOpeningFenceSizeMax: 6
+  let autolinkDomainSizeMax: 63
+  let autolinkSchemeSizeMax: 32
+  let cdataOpeningString: 'CDATA['
+  let characterGroupWhitespace: 1
+  let characterGroupPunctuation: 2
+  let characterReferenceDecimalSizeMax: 7
+  let characterReferenceHexadecimalSizeMax: 6
+  let characterReferenceNamedSizeMax: 31
+  let codeFencedSequenceSizeMin: 3
+  let contentTypeDocument: 'document'
+  let contentTypeFlow: 'flow'
+  let contentTypeContent: 'content'
+  let contentTypeString: 'string'
+  let contentTypeText: 'text'
+  let hardBreakPrefixSizeMin: 2
+  let htmlRaw: 1
+  let htmlComment: 2
+  let htmlInstruction: 3
+  let htmlDeclaration: 4
+  let htmlCdata: 5
+  let htmlBasic: 6
+  let htmlComplete: 7
+  let htmlRawSizeMax: 8
+  let linkResourceDestinationBalanceMax: 32
+  let linkReferenceSizeMax: 999
+  let listItemValueSizeMax: 10
+  let numericBaseDecimal: 10
+  let numericBaseHexadecimal: 16
+  let tabSize: 4
+  let thematicBreakMarkerCountMin: 3
+  let v8MaxSafeChunkSize: 10000
+}

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-symbol/lib/constants.js

@@ -0,0 +1,44 @@
+/**
+ * This module is compiled away!
+ *
+ * Parsing markdown comes with a couple of constants, such as minimum or maximum
+ * sizes of certain sequences.
+ * Additionally, there are a couple symbols used inside micromark.
+ * These are all defined here, but compiled away by scripts.
+ */
+export const constants = /** @type {const} */ ({
+  attentionSideBefore: 1, // Symbol to mark an attention sequence as before content: `*a`
+  attentionSideAfter: 2, // Symbol to mark an attention sequence as after content: `a*`
+  atxHeadingOpeningFenceSizeMax: 6, // 6 number signs is fine, 7 isn’t.
+  autolinkDomainSizeMax: 63, // 63 characters is fine, 64 is too many.
+  autolinkSchemeSizeMax: 32, // 32 characters is fine, 33 is too many.
+  cdataOpeningString: 'CDATA[', // And preceded by `<![`.
+  characterGroupWhitespace: 1, // Symbol used to indicate a character is whitespace
+  characterGroupPunctuation: 2, // Symbol used to indicate a character is punctuation
+  characterReferenceDecimalSizeMax: 7, // `&#9999999;`.
+  characterReferenceHexadecimalSizeMax: 6, // `&#xff9999;`.
+  characterReferenceNamedSizeMax: 31, // `&CounterClockwiseContourIntegral;`.
+  codeFencedSequenceSizeMin: 3, // At least 3 ticks or tildes are needed.
+  contentTypeDocument: 'document',
+  contentTypeFlow: 'flow',
+  contentTypeContent: 'content',
+  contentTypeString: 'string',
+  contentTypeText: 'text',
+  hardBreakPrefixSizeMin: 2, // At least 2 trailing spaces are needed.
+  htmlRaw: 1, // Symbol for `<script>`
+  htmlComment: 2, // Symbol for `<!---->`
+  htmlInstruction: 3, // Symbol for `<?php?>`
+  htmlDeclaration: 4, // Symbol for `<!doctype>`
+  htmlCdata: 5, // Symbol for `<![CDATA[]]>`
+  htmlBasic: 6, // Symbol for `<div`
+  htmlComplete: 7, // Symbol for `<x>`
+  htmlRawSizeMax: 8, // Length of `textarea`.
+  linkResourceDestinationBalanceMax: 32, // See: <https://spec.commonmark.org/0.30/#link-destination>, <https://github.com/remarkjs/react-markdown/issues/658#issuecomment-984345577>
+  linkReferenceSizeMax: 999, // See: <https://spec.commonmark.org/0.30/#link-label>
+  listItemValueSizeMax: 10, // See: <https://spec.commonmark.org/0.30/#ordered-list-marker>
+  numericBaseDecimal: 10,
+  numericBaseHexadecimal: 0x10,
+  tabSize: 4, // Tabs have a hard-coded size of 4, per CommonMark.
+  thematicBreakMarkerCountMin: 3, // At least 3 asterisks, dashes, or underscores are needed.
+  v8MaxSafeChunkSize: 10000 // V8 (and potentially others) have problems injecting giant arrays into other arrays, hence we operate in chunks.
+})

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-symbol/lib/default.d.ts

@@ -0,0 +1,4 @@
+export {codes} from './codes.js'
+export {constants} from './constants.js'
+export {types} from './types.js'
+export {values} from './values.js'

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-symbol/lib/default.js

@@ -0,0 +1,4 @@
+export {codes} from './codes.js'
+export {constants} from './constants.js'
+export {types} from './types.js'
+export {values} from './values.js'

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-symbol/lib/types.d.ts

@@ -0,0 +1,105 @@
+export namespace types {
+  let data: 'data'
+  let whitespace: 'whitespace'
+  let lineEnding: 'lineEnding'
+  let lineEndingBlank: 'lineEndingBlank'
+  let linePrefix: 'linePrefix'
+  let lineSuffix: 'lineSuffix'
+  let atxHeading: 'atxHeading'
+  let atxHeadingSequence: 'atxHeadingSequence'
+  let atxHeadingText: 'atxHeadingText'
+  let autolink: 'autolink'
+  let autolinkEmail: 'autolinkEmail'
+  let autolinkMarker: 'autolinkMarker'
+  let autolinkProtocol: 'autolinkProtocol'
+  let characterEscape: 'characterEscape'
+  let characterEscapeValue: 'characterEscapeValue'
+  let characterReference: 'characterReference'
+  let characterReferenceMarker: 'characterReferenceMarker'
+  let characterReferenceMarkerNumeric: 'characterReferenceMarkerNumeric'
+  let characterReferenceMarkerHexadecimal: 'characterReferenceMarkerHexadecimal'
+  let characterReferenceValue: 'characterReferenceValue'
+  let codeFenced: 'codeFenced'
+  let codeFencedFence: 'codeFencedFence'
+  let codeFencedFenceSequence: 'codeFencedFenceSequence'
+  let codeFencedFenceInfo: 'codeFencedFenceInfo'
+  let codeFencedFenceMeta: 'codeFencedFenceMeta'
+  let codeFlowValue: 'codeFlowValue'
+  let codeIndented: 'codeIndented'
+  let codeText: 'codeText'
+  let codeTextData: 'codeTextData'
+  let codeTextPadding: 'codeTextPadding'
+  let codeTextSequence: 'codeTextSequence'
+  let content: 'content'
+  let definition: 'definition'
+  let definitionDestination: 'definitionDestination'
+  let definitionDestinationLiteral: 'definitionDestinationLiteral'
+  let definitionDestinationLiteralMarker: 'definitionDestinationLiteralMarker'
+  let definitionDestinationRaw: 'definitionDestinationRaw'
+  let definitionDestinationString: 'definitionDestinationString'
+  let definitionLabel: 'definitionLabel'
+  let definitionLabelMarker: 'definitionLabelMarker'
+  let definitionLabelString: 'definitionLabelString'
+  let definitionMarker: 'definitionMarker'
+  let definitionTitle: 'definitionTitle'
+  let definitionTitleMarker: 'definitionTitleMarker'
+  let definitionTitleString: 'definitionTitleString'
+  let emphasis: 'emphasis'
+  let emphasisSequence: 'emphasisSequence'
+  let emphasisText: 'emphasisText'
+  let escapeMarker: 'escapeMarker'
+  let hardBreakEscape: 'hardBreakEscape'
+  let hardBreakTrailing: 'hardBreakTrailing'
+  let htmlFlow: 'htmlFlow'
+  let htmlFlowData: 'htmlFlowData'
+  let htmlText: 'htmlText'
+  let htmlTextData: 'htmlTextData'
+  let image: 'image'
+  let label: 'label'
+  let labelText: 'labelText'
+  let labelLink: 'labelLink'
+  let labelImage: 'labelImage'
+  let labelMarker: 'labelMarker'
+  let labelImageMarker: 'labelImageMarker'
+  let labelEnd: 'labelEnd'
+  let link: 'link'
+  let paragraph: 'paragraph'
+  let reference: 'reference'
+  let referenceMarker: 'referenceMarker'
+  let referenceString: 'referenceString'
+  let resource: 'resource'
+  let resourceDestination: 'resourceDestination'
+  let resourceDestinationLiteral: 'resourceDestinationLiteral'
+  let resourceDestinationLiteralMarker: 'resourceDestinationLiteralMarker'
+  let resourceDestinationRaw: 'resourceDestinationRaw'
+  let resourceDestinationString: 'resourceDestinationString'
+  let resourceMarker: 'resourceMarker'
+  let resourceTitle: 'resourceTitle'
+  let resourceTitleMarker: 'resourceTitleMarker'
+  let resourceTitleString: 'resourceTitleString'
+  let setextHeading: 'setextHeading'
+  let setextHeadingText: 'setextHeadingText'
+  let setextHeadingLine: 'setextHeadingLine'
+  let setextHeadingLineSequence: 'setextHeadingLineSequence'
+  let strong: 'strong'
+  let strongSequence: 'strongSequence'
+  let strongText: 'strongText'
+  let thematicBreak: 'thematicBreak'
+  let thematicBreakSequence: 'thematicBreakSequence'
+  let blockQuote: 'blockQuote'
+  let blockQuotePrefix: 'blockQuotePrefix'
+  let blockQuoteMarker: 'blockQuoteMarker'
+  let blockQuotePrefixWhitespace: 'blockQuotePrefixWhitespace'
+  let listOrdered: 'listOrdered'
+  let listUnordered: 'listUnordered'
+  let listItemIndent: 'listItemIndent'
+  let listItemMarker: 'listItemMarker'
+  let listItemPrefix: 'listItemPrefix'
+  let listItemPrefixWhitespace: 'listItemPrefixWhitespace'
+  let listItemValue: 'listItemValue'
+  let chunkDocument: 'chunkDocument'
+  let chunkContent: 'chunkContent'
+  let chunkFlow: 'chunkFlow'
+  let chunkText: 'chunkText'
+  let chunkString: 'chunkString'
+}

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-symbol/lib/types.js

@@ -0,0 +1,453 @@
+/**
+ * This module is compiled away!
+ *
+ * Here is the list of all types of tokens exposed by micromark, with a short
+ * explanation of what they include and where they are found.
+ * In picking names, generally, the rule is to be as explicit as possible
+ * instead of reusing names.
+ * For example, there is a `definitionDestination` and a `resourceDestination`,
+ * instead of one shared name.
+ */
+
+// Note: when changing the next record, you must also change `TokenTypeMap`
+// in `micromark-util-types/index.d.ts`.
+export const types = /** @type {const} */ ({
+  // Generic type for data, such as in a title, a destination, etc.
+  data: 'data',
+
+  // Generic type for syntactic whitespace (tabs, virtual spaces, spaces).
+  // Such as, between a fenced code fence and an info string.
+  whitespace: 'whitespace',
+
+  // Generic type for line endings (line feed, carriage return, carriage return +
+  // line feed).
+  lineEnding: 'lineEnding',
+
+  // A line ending, but ending a blank line.
+  lineEndingBlank: 'lineEndingBlank',
+
+  // Generic type for whitespace (tabs, virtual spaces, spaces) at the start of a
+  // line.
+  linePrefix: 'linePrefix',
+
+  // Generic type for whitespace (tabs, virtual spaces, spaces) at the end of a
+  // line.
+  lineSuffix: 'lineSuffix',
+
+  // Whole ATX heading:
+  //
+  // ```markdown
+  // #
+  // ## Alpha
+  // ### Bravo ###
+  // ```
+  //
+  // Includes `atxHeadingSequence`, `whitespace`, `atxHeadingText`.
+  atxHeading: 'atxHeading',
+
+  // Sequence of number signs in an ATX heading (`###`).
+  atxHeadingSequence: 'atxHeadingSequence',
+
+  // Content in an ATX heading (`alpha`).
+  // Includes text.
+  atxHeadingText: 'atxHeadingText',
+
+  // Whole autolink (`<https://example.com>` or `<admin@example.com>`)
+  // Includes `autolinkMarker` and `autolinkProtocol` or `autolinkEmail`.
+  autolink: 'autolink',
+
+  // Email autolink w/o markers (`admin@example.com`)
+  autolinkEmail: 'autolinkEmail',
+
+  // Marker around an `autolinkProtocol` or `autolinkEmail` (`<` or `>`).
+  autolinkMarker: 'autolinkMarker',
+
+  // Protocol autolink w/o markers (`https://example.com`)
+  autolinkProtocol: 'autolinkProtocol',
+
+  // A whole character escape (`\-`).
+  // Includes `escapeMarker` and `characterEscapeValue`.
+  characterEscape: 'characterEscape',
+
+  // The escaped character (`-`).
+  characterEscapeValue: 'characterEscapeValue',
+
+  // A whole character reference (`&amp;`, `&#8800;`, or `&#x1D306;`).
+  // Includes `characterReferenceMarker`, an optional
+  // `characterReferenceMarkerNumeric`, in which case an optional
+  // `characterReferenceMarkerHexadecimal`, and a `characterReferenceValue`.
+  characterReference: 'characterReference',
+
+  // The start or end marker (`&` or `;`).
+  characterReferenceMarker: 'characterReferenceMarker',
+
+  // Mark reference as numeric (`#`).
+  characterReferenceMarkerNumeric: 'characterReferenceMarkerNumeric',
+
+  // Mark reference as numeric (`x` or `X`).
+  characterReferenceMarkerHexadecimal: 'characterReferenceMarkerHexadecimal',
+
+  // Value of character reference w/o markers (`amp`, `8800`, or `1D306`).
+  characterReferenceValue: 'characterReferenceValue',
+
+  // Whole fenced code:
+  //
+  // ````markdown
+  // ```js
+  // alert(1)
+  // ```
+  // ````
+  codeFenced: 'codeFenced',
+
+  // A fenced code fence, including whitespace, sequence, info, and meta
+  // (` ```js `).
+  codeFencedFence: 'codeFencedFence',
+
+  // Sequence of grave accent or tilde characters (` ``` `) in a fence.
+  codeFencedFenceSequence: 'codeFencedFenceSequence',
+
+  // Info word (`js`) in a fence.
+  // Includes string.
+  codeFencedFenceInfo: 'codeFencedFenceInfo',
+
+  // Meta words (`highlight="1"`) in a fence.
+  // Includes string.
+  codeFencedFenceMeta: 'codeFencedFenceMeta',
+
+  // A line of code.
+  codeFlowValue: 'codeFlowValue',
+
+  // Whole indented code:
+  //
+  // ```markdown
+  //     alert(1)
+  // ```
+  //
+  // Includes `lineEnding`, `linePrefix`, and `codeFlowValue`.
+  codeIndented: 'codeIndented',
+
+  // A text code (``` `alpha` ```).
+  // Includes `codeTextSequence`, `codeTextData`, `lineEnding`, and can include
+  // `codeTextPadding`.
+  codeText: 'codeText',
+
+  codeTextData: 'codeTextData',
+
+  // A space or line ending right after or before a tick.
+  codeTextPadding: 'codeTextPadding',
+
+  // A text code fence (` `` `).
+  codeTextSequence: 'codeTextSequence',
+
+  // Whole content:
+  //
+  // ```markdown
+  // [a]: b
+  // c
+  // =
+  // d
+  // ```
+  //
+  // Includes `paragraph` and `definition`.
+  content: 'content',
+  // Whole definition:
+  //
+  // ```markdown
+  // [micromark]: https://github.com/micromark/micromark
+  // ```
+  //
+  // Includes `definitionLabel`, `definitionMarker`, `whitespace`,
+  // `definitionDestination`, and optionally `lineEnding` and `definitionTitle`.
+  definition: 'definition',
+
+  // Destination of a definition (`https://github.com/micromark/micromark` or
+  // `<https://github.com/micromark/micromark>`).
+  // Includes `definitionDestinationLiteral` or `definitionDestinationRaw`.
+  definitionDestination: 'definitionDestination',
+
+  // Enclosed destination of a definition
+  // (`<https://github.com/micromark/micromark>`).
+  // Includes `definitionDestinationLiteralMarker` and optionally
+  // `definitionDestinationString`.
+  definitionDestinationLiteral: 'definitionDestinationLiteral',
+
+  // Markers of an enclosed definition destination (`<` or `>`).
+  definitionDestinationLiteralMarker: 'definitionDestinationLiteralMarker',
+
+  // Unenclosed destination of a definition
+  // (`https://github.com/micromark/micromark`).
+  // Includes `definitionDestinationString`.
+  definitionDestinationRaw: 'definitionDestinationRaw',
+
+  // Text in an destination (`https://github.com/micromark/micromark`).
+  // Includes string.
+  definitionDestinationString: 'definitionDestinationString',
+
+  // Label of a definition (`[micromark]`).
+  // Includes `definitionLabelMarker` and `definitionLabelString`.
+  definitionLabel: 'definitionLabel',
+
+  // Markers of a definition label (`[` or `]`).
+  definitionLabelMarker: 'definitionLabelMarker',
+
+  // Value of a definition label (`micromark`).
+  // Includes string.
+  definitionLabelString: 'definitionLabelString',
+
+  // Marker between a label and a destination (`:`).
+  definitionMarker: 'definitionMarker',
+
+  // Title of a definition (`"x"`, `'y'`, or `(z)`).
+  // Includes `definitionTitleMarker` and optionally `definitionTitleString`.
+  definitionTitle: 'definitionTitle',
+
+  // Marker around a title of a definition (`"`, `'`, `(`, or `)`).
+  definitionTitleMarker: 'definitionTitleMarker',
+
+  // Data without markers in a title (`z`).
+  // Includes string.
+  definitionTitleString: 'definitionTitleString',
+
+  // Emphasis (`*alpha*`).
+  // Includes `emphasisSequence` and `emphasisText`.
+  emphasis: 'emphasis',
+
+  // Sequence of emphasis markers (`*` or `_`).
+  emphasisSequence: 'emphasisSequence',
+
+  // Emphasis text (`alpha`).
+  // Includes text.
+  emphasisText: 'emphasisText',
+
+  // The character escape marker (`\`).
+  escapeMarker: 'escapeMarker',
+
+  // A hard break created with a backslash (`\\n`).
+  // Note: does not include the line ending.
+  hardBreakEscape: 'hardBreakEscape',
+
+  // A hard break created with trailing spaces (`  \n`).
+  // Does not include the line ending.
+  hardBreakTrailing: 'hardBreakTrailing',
+
+  // Flow HTML:
+  //
+  // ```markdown
+  // <div
+  // ```
+  //
+  // Inlcudes `lineEnding`, `htmlFlowData`.
+  htmlFlow: 'htmlFlow',
+
+  htmlFlowData: 'htmlFlowData',
+
+  // HTML in text (the tag in `a <i> b`).
+  // Includes `lineEnding`, `htmlTextData`.
+  htmlText: 'htmlText',
+
+  htmlTextData: 'htmlTextData',
+
+  // Whole image (`![alpha](bravo)`, `![alpha][bravo]`, `![alpha][]`, or
+  // `![alpha]`).
+  // Includes `label` and an optional `resource` or `reference`.
+  image: 'image',
+
+  // Whole link label (`[*alpha*]`).
+  // Includes `labelLink` or `labelImage`, `labelText`, and `labelEnd`.
+  label: 'label',
+
+  // Text in an label (`*alpha*`).
+  // Includes text.
+  labelText: 'labelText',
+
+  // Start a link label (`[`).
+  // Includes a `labelMarker`.
+  labelLink: 'labelLink',
+
+  // Start an image label (`![`).
+  // Includes `labelImageMarker` and `labelMarker`.
+  labelImage: 'labelImage',
+
+  // Marker of a label (`[` or `]`).
+  labelMarker: 'labelMarker',
+
+  // Marker to start an image (`!`).
+  labelImageMarker: 'labelImageMarker',
+
+  // End a label (`]`).
+  // Includes `labelMarker`.
+  labelEnd: 'labelEnd',
+
+  // Whole link (`[alpha](bravo)`, `[alpha][bravo]`, `[alpha][]`, or `[alpha]`).
+  // Includes `label` and an optional `resource` or `reference`.
+  link: 'link',
+
+  // Whole paragraph:
+  //
+  // ```markdown
+  // alpha
+  // bravo.
+  // ```
+  //
+  // Includes text.
+  paragraph: 'paragraph',
+
+  // A reference (`[alpha]` or `[]`).
+  // Includes `referenceMarker` and an optional `referenceString`.
+  reference: 'reference',
+
+  // A reference marker (`[` or `]`).
+  referenceMarker: 'referenceMarker',
+
+  // Reference text (`alpha`).
+  // Includes string.
+  referenceString: 'referenceString',
+
+  // A resource (`(https://example.com "alpha")`).
+  // Includes `resourceMarker`, an optional `resourceDestination` with an optional
+  // `whitespace` and `resourceTitle`.
+  resource: 'resource',
+
+  // A resource destination (`https://example.com`).
+  // Includes `resourceDestinationLiteral` or `resourceDestinationRaw`.
+  resourceDestination: 'resourceDestination',
+
+  // A literal resource destination (`<https://example.com>`).
+  // Includes `resourceDestinationLiteralMarker` and optionally
+  // `resourceDestinationString`.
+  resourceDestinationLiteral: 'resourceDestinationLiteral',
+
+  // A resource destination marker (`<` or `>`).
+  resourceDestinationLiteralMarker: 'resourceDestinationLiteralMarker',
+
+  // A raw resource destination (`https://example.com`).
+  // Includes `resourceDestinationString`.
+  resourceDestinationRaw: 'resourceDestinationRaw',
+
+  // Resource destination text (`https://example.com`).
+  // Includes string.
+  resourceDestinationString: 'resourceDestinationString',
+
+  // A resource marker (`(` or `)`).
+  resourceMarker: 'resourceMarker',
+
+  // A resource title (`"alpha"`, `'alpha'`, or `(alpha)`).
+  // Includes `resourceTitleMarker` and optionally `resourceTitleString`.
+  resourceTitle: 'resourceTitle',
+
+  // A resource title marker (`"`, `'`, `(`, or `)`).
+  resourceTitleMarker: 'resourceTitleMarker',
+
+  // Resource destination title (`alpha`).
+  // Includes string.
+  resourceTitleString: 'resourceTitleString',
+
+  // Whole setext heading:
+  //
+  // ```markdown
+  // alpha
+  // bravo
+  // =====
+  // ```
+  //
+  // Includes `setextHeadingText`, `lineEnding`, `linePrefix`, and
+  // `setextHeadingLine`.
+  setextHeading: 'setextHeading',
+
+  // Content in a setext heading (`alpha\nbravo`).
+  // Includes text.
+  setextHeadingText: 'setextHeadingText',
+
+  // Underline in a setext heading, including whitespace suffix (`==`).
+  // Includes `setextHeadingLineSequence`.
+  setextHeadingLine: 'setextHeadingLine',
+
+  // Sequence of equals or dash characters in underline in a setext heading (`-`).
+  setextHeadingLineSequence: 'setextHeadingLineSequence',
+
+  // Strong (`**alpha**`).
+  // Includes `strongSequence` and `strongText`.
+  strong: 'strong',
+
+  // Sequence of strong markers (`**` or `__`).
+  strongSequence: 'strongSequence',
+
+  // Strong text (`alpha`).
+  // Includes text.
+  strongText: 'strongText',
+
+  // Whole thematic break:
+  //
+  // ```markdown
+  // * * *
+  // ```
+  //
+  // Includes `thematicBreakSequence` and `whitespace`.
+  thematicBreak: 'thematicBreak',
+
+  // A sequence of one or more thematic break markers (`***`).
+  thematicBreakSequence: 'thematicBreakSequence',
+
+  // Whole block quote:
+  //
+  // ```markdown
+  // > a
+  // >
+  // > b
+  // ```
+  //
+  // Includes `blockQuotePrefix` and flow.
+  blockQuote: 'blockQuote',
+  // The `>` or `> ` of a block quote.
+  blockQuotePrefix: 'blockQuotePrefix',
+  // The `>` of a block quote prefix.
+  blockQuoteMarker: 'blockQuoteMarker',
+  // The optional ` ` of a block quote prefix.
+  blockQuotePrefixWhitespace: 'blockQuotePrefixWhitespace',
+
+  // Whole unordered list:
+  //
+  // ```markdown
+  // - a
+  //   b
+  // ```
+  //
+  // Includes `listItemPrefix`, flow, and optionally  `listItemIndent` on further
+  // lines.
+  listOrdered: 'listOrdered',
+
+  // Whole ordered list:
+  //
+  // ```markdown
+  // 1. a
+  //    b
+  // ```
+  //
+  // Includes `listItemPrefix`, flow, and optionally  `listItemIndent` on further
+  // lines.
+  listUnordered: 'listUnordered',
+
+  // The indent of further list item lines.
+  listItemIndent: 'listItemIndent',
+
+  // A marker, as in, `*`, `+`, `-`, `.`, or `)`.
+  listItemMarker: 'listItemMarker',
+
+  // The thing that starts a list item, such as `1. `.
+  // Includes `listItemValue` if ordered, `listItemMarker`, and
+  // `listItemPrefixWhitespace` (unless followed by a line ending).
+  listItemPrefix: 'listItemPrefix',
+
+  // The whitespace after a marker.
+  listItemPrefixWhitespace: 'listItemPrefixWhitespace',
+
+  // The numerical value of an ordered item.
+  listItemValue: 'listItemValue',
+
+  // Internal types used for subtokenizers, compiled away
+  chunkDocument: 'chunkDocument',
+  chunkContent: 'chunkContent',
+  chunkFlow: 'chunkFlow',
+  chunkText: 'chunkText',
+  chunkString: 'chunkString'
+})

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-symbol/lib/values.d.ts

@@ -0,0 +1,101 @@
+export namespace values {
+  let ht: '\t'
+  let lf: '\n'
+  let cr: '\r'
+  let space: ' '
+  let exclamationMark: '!'
+  let quotationMark: '"'
+  let numberSign: '#'
+  let dollarSign: '$'
+  let percentSign: '%'
+  let ampersand: '&'
+  let apostrophe: "'"
+  let leftParenthesis: '('
+  let rightParenthesis: ')'
+  let asterisk: '*'
+  let plusSign: '+'
+  let comma: ','
+  let dash: '-'
+  let dot: '.'
+  let slash: '/'
+  let digit0: '0'
+  let digit1: '1'
+  let digit2: '2'
+  let digit3: '3'
+  let digit4: '4'
+  let digit5: '5'
+  let digit6: '6'
+  let digit7: '7'
+  let digit8: '8'
+  let digit9: '9'
+  let colon: ':'
+  let semicolon: ';'
+  let lessThan: '<'
+  let equalsTo: '='
+  let greaterThan: '>'
+  let questionMark: '?'
+  let atSign: '@'
+  let uppercaseA: 'A'
+  let uppercaseB: 'B'
+  let uppercaseC: 'C'
+  let uppercaseD: 'D'
+  let uppercaseE: 'E'
+  let uppercaseF: 'F'
+  let uppercaseG: 'G'
+  let uppercaseH: 'H'
+  let uppercaseI: 'I'
+  let uppercaseJ: 'J'
+  let uppercaseK: 'K'
+  let uppercaseL: 'L'
+  let uppercaseM: 'M'
+  let uppercaseN: 'N'
+  let uppercaseO: 'O'
+  let uppercaseP: 'P'
+  let uppercaseQ: 'Q'
+  let uppercaseR: 'R'
+  let uppercaseS: 'S'
+  let uppercaseT: 'T'
+  let uppercaseU: 'U'
+  let uppercaseV: 'V'
+  let uppercaseW: 'W'
+  let uppercaseX: 'X'
+  let uppercaseY: 'Y'
+  let uppercaseZ: 'Z'
+  let leftSquareBracket: '['
+  let backslash: '\\'
+  let rightSquareBracket: ']'
+  let caret: '^'
+  let underscore: '_'
+  let graveAccent: '`'
+  let lowercaseA: 'a'
+  let lowercaseB: 'b'
+  let lowercaseC: 'c'
+  let lowercaseD: 'd'
+  let lowercaseE: 'e'
+  let lowercaseF: 'f'
+  let lowercaseG: 'g'
+  let lowercaseH: 'h'
+  let lowercaseI: 'i'
+  let lowercaseJ: 'j'
+  let lowercaseK: 'k'
+  let lowercaseL: 'l'
+  let lowercaseM: 'm'
+  let lowercaseN: 'n'
+  let lowercaseO: 'o'
+  let lowercaseP: 'p'
+  let lowercaseQ: 'q'
+  let lowercaseR: 'r'
+  let lowercaseS: 's'
+  let lowercaseT: 't'
+  let lowercaseU: 'u'
+  let lowercaseV: 'v'
+  let lowercaseW: 'w'
+  let lowercaseX: 'x'
+  let lowercaseY: 'y'
+  let lowercaseZ: 'z'
+  let leftCurlyBrace: '{'
+  let verticalBar: '|'
+  let rightCurlyBrace: '}'
+  let tilde: '~'
+  let replacementCharacter: '<27>'
+}

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-symbol/lib/values.js

@@ -0,0 +1,109 @@
+/**
+ * This module is compiled away!
+ *
+ * While micromark works based on character codes, this module includes the
+ * string versions of ’em.
+ * The C0 block, except for LF, CR, HT, and w/ the replacement character added,
+ * are available here.
+ */
+export const values = /** @type {const} */ ({
+  ht: '\t',
+  lf: '\n',
+  cr: '\r',
+  space: ' ',
+  exclamationMark: '!',
+  quotationMark: '"',
+  numberSign: '#',
+  dollarSign: '$',
+  percentSign: '%',
+  ampersand: '&',
+  apostrophe: "'",
+  leftParenthesis: '(',
+  rightParenthesis: ')',
+  asterisk: '*',
+  plusSign: '+',
+  comma: ',',
+  dash: '-',
+  dot: '.',
+  slash: '/',
+  digit0: '0',
+  digit1: '1',
+  digit2: '2',
+  digit3: '3',
+  digit4: '4',
+  digit5: '5',
+  digit6: '6',
+  digit7: '7',
+  digit8: '8',
+  digit9: '9',
+  colon: ':',
+  semicolon: ';',
+  lessThan: '<',
+  equalsTo: '=',
+  greaterThan: '>',
+  questionMark: '?',
+  atSign: '@',
+  uppercaseA: 'A',
+  uppercaseB: 'B',
+  uppercaseC: 'C',
+  uppercaseD: 'D',
+  uppercaseE: 'E',
+  uppercaseF: 'F',
+  uppercaseG: 'G',
+  uppercaseH: 'H',
+  uppercaseI: 'I',
+  uppercaseJ: 'J',
+  uppercaseK: 'K',
+  uppercaseL: 'L',
+  uppercaseM: 'M',
+  uppercaseN: 'N',
+  uppercaseO: 'O',
+  uppercaseP: 'P',
+  uppercaseQ: 'Q',
+  uppercaseR: 'R',
+  uppercaseS: 'S',
+  uppercaseT: 'T',
+  uppercaseU: 'U',
+  uppercaseV: 'V',
+  uppercaseW: 'W',
+  uppercaseX: 'X',
+  uppercaseY: 'Y',
+  uppercaseZ: 'Z',
+  leftSquareBracket: '[',
+  backslash: '\\',
+  rightSquareBracket: ']',
+  caret: '^',
+  underscore: '_',
+  graveAccent: '`',
+  lowercaseA: 'a',
+  lowercaseB: 'b',
+  lowercaseC: 'c',
+  lowercaseD: 'd',
+  lowercaseE: 'e',
+  lowercaseF: 'f',
+  lowercaseG: 'g',
+  lowercaseH: 'h',
+  lowercaseI: 'i',
+  lowercaseJ: 'j',
+  lowercaseK: 'k',
+  lowercaseL: 'l',
+  lowercaseM: 'm',
+  lowercaseN: 'n',
+  lowercaseO: 'o',
+  lowercaseP: 'p',
+  lowercaseQ: 'q',
+  lowercaseR: 'r',
+  lowercaseS: 's',
+  lowercaseT: 't',
+  lowercaseU: 'u',
+  lowercaseV: 'v',
+  lowercaseW: 'w',
+  lowercaseX: 'x',
+  lowercaseY: 'y',
+  lowercaseZ: 'z',
+  leftCurlyBrace: '{',
+  verticalBar: '|',
+  rightCurlyBrace: '}',
+  tilde: '~',
+  replacementCharacter: '<27>'
+})

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-symbol/package.json

@@ -0,0 +1,35 @@
+{
+  "name": "micromark-util-symbol",
+  "version": "2.0.0",
+  "description": "micromark utility with symbols",
+  "license": "MIT",
+  "keywords": [
+    "micromark",
+    "util",
+    "utility",
+    "symbol"
+  ],
+  "repository": "https://github.com/micromark/micromark/tree/main/packages/micromark-util-symbol",
+  "bugs": "https://github.com/micromark/micromark/issues",
+  "funding": [
+    {
+      "type": "GitHub Sponsors",
+      "url": "https://github.com/sponsors/unifiedjs"
+    },
+    {
+      "type": "OpenCollective",
+      "url": "https://opencollective.com/unified"
+    }
+  ],
+  "author": "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)",
+  "contributors": [
+    "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
+  ],
+  "sideEffects": false,
+  "type": "module",
+  "files": [
+    "lib/"
+  ],
+  "exports": "./lib/default.js",
+  "xo": false
+}

node_modules/micromark-extension-gfm-footnote/node_modules/micromark-util-symbol/readme.md

@@ -0,0 +1,168 @@
+# micromark-util-symbol
+
+[![Build][build-badge]][build]
+[![Coverage][coverage-badge]][coverage]
+[![Downloads][downloads-badge]][downloads]
+[![Size][bundle-size-badge]][bundle-size]
+[![Sponsors][sponsors-badge]][opencollective]
+[![Backers][backers-badge]][opencollective]
+[![Chat][chat-badge]][chat]
+
+[micromark][] utility with symbols.
+
+## Contents
+
+*   [What is this?](#what-is-this)
+*   [When should I use this?](#when-should-i-use-this)
+*   [Install](#install)
+*   [Use](#use)
+*   [API](#api)
+*   [Types](#types)
+*   [Compatibility](#compatibility)
+*   [Security](#security)
+*   [Contribute](#contribute)
+*   [License](#license)
+
+## What is this?
+
+This package exposes constants used throughout the micromark ecosystem.
+
+## When should I use this?
+
+This package is useful when you are making your own micromark extensions.
+It’s useful to reference these constants by name instead of value while
+developing.
+[`micromark-build`][micromark-build] compiles them away for production code.
+
+## Install
+
+This package is [ESM only][esm].
+In Node.js (version 16+), install with [npm][]:
+
+```sh
+npm install micromark-util-symbol
+```
+
+In Deno with [`esm.sh`][esmsh]:
+
+```js
+import * as symbol from 'https://esm.sh/micromark-util-symbol@1'
+```
+
+In browsers with [`esm.sh`][esmsh]:
+
+```html
+<script type="module">
+  import * as symbol from 'https://esm.sh/micromark-util-symbol@1?bundle'
+</script>
+```
+
+## Use
+
+```js
+import {codes, constants, types, values} from 'micromark-util-symbol'
+
+console.log(codes.atSign) // 64
+console.log(constants.characterReferenceNamedSizeMax) // 31
+console.log(types.definitionDestinationRaw) // 'definitionDestinationRaw'
+console.log(values.atSign) // '@'
+```
+
+## API
+
+This package exports the identifiers `codes`, `constants`, `types`, and
+`values`.
+There is no default export.
+
+Each identifier is an object mapping strings to values.
+See the code for the exposed data.
+
+## Types
+
+This package is fully typed with [TypeScript][].
+It exports no additional types.
+
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line,
+`micromark-util-symbol@^2`, compatible with Node.js 16.
+This package works with `micromark@^3`.
+
+## Security
+
+This package is safe.
+See [`security.md`][securitymd] in [`micromark/.github`][health] for how to
+submit a security report.
+
+## Contribute
+
+See [`contributing.md`][contributing] in [`micromark/.github`][health] for ways
+to get started.
+See [`support.md`][support] for ways to get help.
+
+This project has a [code of conduct][coc].
+By interacting with this repository, organisation, or community you agree to
+abide by its terms.
+
+## License
+
+[MIT][license] © [Titus Wormer][author]
+
+<!-- Definitions -->
+
+[build-badge]: https://github.com/micromark/micromark/workflows/main/badge.svg
+
+[build]: https://github.com/micromark/micromark/actions
+
+[coverage-badge]: https://img.shields.io/codecov/c/github/micromark/micromark.svg
+
+[coverage]: https://codecov.io/github/micromark/micromark
+
+[downloads-badge]: https://img.shields.io/npm/dm/micromark-util-symbol.svg
+
+[downloads]: https://www.npmjs.com/package/micromark-util-symbol
+
+[bundle-size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size&query=$.size.compressedSize&url=https://deno.bundlejs.com/?q=micromark-util-symbol
+
+[bundle-size]: https://bundlejs.com/?q=micromark-util-symbol
+
+[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg
+
+[backers-badge]: https://opencollective.com/unified/backers/badge.svg
+
+[opencollective]: https://opencollective.com/unified
+
+[npm]: https://docs.npmjs.com/cli/install
+
+[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
+
+[esmsh]: https://esm.sh
+
+[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg
+
+[chat]: https://github.com/micromark/micromark/discussions
+
+[license]: https://github.com/micromark/micromark/blob/main/license
+
+[author]: https://wooorm.com
+
+[health]: https://github.com/micromark/.github
+
+[securitymd]: https://github.com/micromark/.github/blob/main/security.md
+
+[contributing]: https://github.com/micromark/.github/blob/main/contributing.md
+
+[support]: https://github.com/micromark/.github/blob/main/support.md
+
+[coc]: https://github.com/micromark/.github/blob/main/code-of-conduct.md
+
+[typescript]: https://www.typescriptlang.org
+
+[micromark]: https://github.com/micromark/micromark
+
+[micromark-build]: https://github.com/micromark/micromark/tree/main/packages/micromark-build

node_modules/micromark-extension-gfm-footnote/package.json

@@ -0,0 +1,114 @@
+{
+  "name": "micromark-extension-gfm-footnote",
+  "version": "2.0.0",
+  "description": "micromark extension to support GFM footnotes",
+  "license": "MIT",
+  "keywords": [
+    "micromark",
+    "micromark-extension",
+    "gfm",
+    "footnote",
+    "note",
+    "definition",
+    "markdown",
+    "unified"
+  ],
+  "repository": "micromark/micromark-extension-gfm-footnote",
+  "bugs": "https://github.com/micromark/micromark-extension-gfm-footnote/issues",
+  "funding": {
+    "type": "opencollective",
+    "url": "https://opencollective.com/unified"
+  },
+  "author": "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)",
+  "contributors": [
+    "Titus Wormer <tituswormer@gmail.com> (https://wooorm.com)"
+  ],
+  "sideEffects": false,
+  "type": "module",
+  "files": [
+    "dev/",
+    "lib/",
+    "index.d.ts",
+    "index.js"
+  ],
+  "exports": {
+    "development": "./dev/index.js",
+    "default": "./index.js"
+  },
+  "dependencies": {
+    "devlop": "^1.0.0",
+    "micromark-core-commonmark": "^2.0.0",
+    "micromark-factory-space": "^2.0.0",
+    "micromark-util-character": "^2.0.0",
+    "micromark-util-normalize-identifier": "^2.0.0",
+    "micromark-util-sanitize-uri": "^2.0.0",
+    "micromark-util-symbol": "^2.0.0",
+    "micromark-util-types": "^2.0.0"
+  },
+  "devDependencies": {
+    "@types/node": "^20.0.0",
+    "c8": "^8.0.0",
+    "create-gfm-fixtures": "^1.0.0",
+    "micromark": "^4.0.0",
+    "micromark-build": "^2.0.0",
+    "prettier": "^2.0.0",
+    "remark-cli": "^11.0.0",
+    "remark-preset-wooorm": "^9.0.0",
+    "type-coverage": "^2.0.0",
+    "typescript": "^5.0.0",
+    "xo": "^0.54.0"
+  },
+  "scripts": {
+    "prepack": "npm run build && npm run format",
+    "build": "tsc --build --clean && tsc --build && type-coverage && micromark-build",
+    "format": "remark . -qfo && prettier . -w --loglevel warn && xo --fix",
+    "test-api-prod": "node --conditions production test/index.js",
+    "test-api-dev": "node --conditions development test/index.js",
+    "test-api": "npm run test-api-dev && npm run test-api-prod",
+    "test-coverage": "c8 --100 --reporter lcov npm run test-api",
+    "test": "npm run build && npm run format && npm run test-coverage"
+  },
+  "prettier": {
+    "bracketSpacing": false,
+    "semi": false,
+    "singleQuote": true,
+    "tabWidth": 2,
+    "trailingComma": "none",
+    "useTabs": false
+  },
+  "remarkConfig": {
+    "plugins": [
+      "remark-preset-wooorm"
+    ]
+  },
+  "typeCoverage": {
+    "atLeast": 100,
+    "detail": true,
+    "ignoreCatch": true,
+    "strict": true
+  },
+  "xo": {
+    "prettier": true,
+    "rules": {
+      "unicorn/no-this-assignment": "off"
+    },
+    "overrides": [
+      {
+        "files": [
+          "**/*.ts"
+        ],
+        "rules": {
+          "@typescript-eslint/consistent-type-definitions": 0
+        }
+      },
+      {
+        "files": [
+          "test/**/*.js"
+        ],
+        "rules": {
+          "no-await-in-loop": 0
+        }
+      }
+    ]
+  }
+}

node_modules/micromark-extension-gfm-footnote/readme.md

@@ -0,0 +1,656 @@
+# micromark-extension-gfm-footnote
+
+[![Build][build-badge]][build]
+[![Coverage][coverage-badge]][coverage]
+[![Downloads][downloads-badge]][downloads]
+[![Size][size-badge]][size]
+[![Sponsors][sponsors-badge]][collective]
+[![Backers][backers-badge]][collective]
+[![Chat][chat-badge]][chat]
+
+[micromark][] extensions to support GFM [footnotes][post].
+
+## Contents
+
+*   [What is this?](#what-is-this)
+*   [When to use this](#when-to-use-this)
+*   [Install](#install)
+*   [Use](#use)
+*   [API](#api)
+    *   [`defaultBackLabel(referenceIndex, rereferenceIndex)`](#defaultbacklabelreferenceindex-rereferenceindex)
+    *   [`gfmFootnote()`](#gfmfootnote)
+    *   [`gfmFootnoteHtml(options?)`](#gfmfootnotehtmloptions)
+    *   [`BackLabelTemplate`](#backlabeltemplate)
+    *   [`HtmlOptions`](#htmloptions)
+*   [Bugs](#bugs)
+*   [Authoring](#authoring)
+*   [HTML](#html)
+*   [CSS](#css)
+*   [Syntax](#syntax)
+*   [Types](#types)
+*   [Compatibility](#compatibility)
+*   [Security](#security)
+*   [Related](#related)
+*   [Contribute](#contribute)
+*   [License](#license)
+
+## What is this?
+
+This package contains extensions that add support for footnotes as enabled by
+GFM to [`micromark`][micromark].
+
+GitHub announced footnotes [on September 30, 2021][post] but did not specify
+them in their GFM spec.
+As they are implemented in their parser and supported in all places where
+other GFM features work, they can be considered part of GFM.
+GitHub employs several other features (such as mentions or frontmatter) that
+are either not in their parser, or not in all places where GFM features work,
+which should not be considered GFM.
+
+The implementation of footnotes on github.com is currently buggy.
+The bugs have been reported on [`cmark-gfm`][cmark-gfm].
+This micromark extension matches github.com except for its bugs.
+
+## When to use this
+
+This project is useful when you want to support footnotes in markdown.
+
+You can use these extensions when you are working with [`micromark`][micromark].
+To support all GFM features, use
+[`micromark-extension-gfm`][micromark-extension-gfm] instead.
+
+When you need a syntax tree, combine this package with
+[`mdast-util-gfm-footnote`][mdast-util-gfm-footnote].
+
+All these packages are used in [`remark-gfm`][remark-gfm], which focusses on
+making it easier to transform content by abstracting these internals away.
+
+## Install
+
+This package is [ESM only][esm].
+In Node.js (version 16+), install with [npm][]:
+
+```sh
+npm install micromark-extension-gfm-footnote
+```
+
+In Deno with [`esm.sh`][esmsh]:
+
+```js
+import {gfmFootnote, gfmFootnoteHtml} from 'https://esm.sh/micromark-extension-gfm-footnote@2'
+```
+
+In browsers with [`esm.sh`][esmsh]:
+
+```html
+<script type="module">
+  import {gfmFootnote, gfmFootnoteHtml} from 'https://esm.sh/micromark-extension-gfm-footnote@2?bundle'
+</script>
+```
+
+## Use
+
+Say our document `example.md` contains:
+
+````markdown
+Using footnotes is fun![^1] They let you reference relevant information without disrupting the flow of what you’re trying to say.[^bignote]
+
+[^1]: This is the first footnote.
+[^bignote]: Here’s one with multiple paragraphs and code.
+
+    Indent paragraphs to include them in the footnote.
+
+    ```
+    my code
+    ```
+
+    Add as many paragraphs as you like.
+
+Text here and here and here.
+[Learn more about markdown and footnotes in markdown](https://docs.github.com/en/github/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#footnotes)
+````
+
+…and our module `example.js` looks as follows:
+
+```js
+import fs from 'node:fs/promises'
+import {micromark} from 'micromark'
+import {gfmFootnote, gfmFootnoteHtml} from 'micromark-extension-gfm-footnote'
+
+const output = micromark(await fs.readFile('example.md'), {
+  extensions: [gfmFootnote()],
+  htmlExtensions: [gfmFootnoteHtml()]
+})
+
+console.log(output)
+```
+
+…now running `node example.js` yields:
+
+```html
+<p>Using footnotes is fun!<sup><a href="#user-content-fn-1" id="user-content-fnref-1" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup> They let you reference relevant information without disrupting the flow of what you’re trying to say.<sup><a href="#user-content-fn-bignote" id="user-content-fnref-bignote" data-footnote-ref="" aria-describedby="footnote-label">2</a></sup></p>
+<p>Text here and here and here.
+<a href="https://docs.github.com/en/github/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#footnotes">Learn more about markdown and footnotes in markdown</a></p>
+<section data-footnotes="" class="footnotes"><h2 id="footnote-label" class="sr-only">Footnotes</h2>
+<ol>
+<li id="user-content-fn-1">
+<p>This is the first footnote. <a href="#user-content-fnref-1" data-footnote-backref="" class="data-footnote-backref" aria-label="Back to content">↩</a></p>
+</li>
+<li id="user-content-fn-bignote">
+<p>Here’s one with multiple paragraphs and code.</p>
+<p>Indent paragraphs to include them in the footnote.</p>
+<pre><code>my code
+</code></pre>
+<p>Add as many paragraphs as you like. <a href="#user-content-fnref-bignote" data-footnote-backref="" class="data-footnote-backref" aria-label="Back to content">↩</a></p>
+</li>
+</ol>
+</section>
+```
+
+## API
+
+This package exports the identifiers
+[`defaultBackLabel`][api-default-back-label],
+[`gfmFootnote`][api-gfm-footnote], and
+[`gfmFootnoteHtml`][api-gfm-footnote-html].
+There is no default export.
+
+The export map supports the [`development` condition][development].
+Run `node --conditions development module.js` to get instrumented dev code.
+Without this condition, production code is loaded.
+
+### `defaultBackLabel(referenceIndex, rereferenceIndex)`
+
+Generate the default label that GitHub uses on backreferences
+([`BackLabelTemplate`][api-back-label-template]).
+
+### `gfmFootnote()`
+
+Create an extension for `micromark` to enable GFM footnote syntax.
+
+###### Returns
+
+Extension for `micromark` that can be passed in `extensions` to enable GFM
+footnote syntax ([`Extension`][micromark-extension]).
+
+### `gfmFootnoteHtml(options?)`
+
+Create an extension for `micromark` to support GFM footnotes when serializing
+to HTML.
+
+###### Parameters
+
+*   `options` ([`HtmlOptions`][api-html-options], optional)
+    — configuration
+
+###### Returns
+
+Extension for `micromark` that can be passed in `htmlExtensions` to support GFM
+footnotes when serializing to HTML
+([`HtmlExtension`][micromark-html-extension]).
+
+### `BackLabelTemplate`
+
+Generate a back label dynamically (TypeScript type).
+
+For the following markdown:
+
+```markdown
+Alpha[^micromark], bravo[^micromark], and charlie[^remark].
+
+[^remark]: things about remark
+[^micromark]: things about micromark
+```
+
+This function will be called with:
+
+*   `0` and `0` for the backreference from `things about micromark` to
+    `alpha`, as it is the first used definition, and the first call to it
+*   `0` and `1` for the backreference from `things about micromark` to
+    `bravo`, as it is the first used definition, and the second call to it
+*   `1` and `0` for the backreference from `things about remark` to
+    `charlie`, as it is the second used definition
+
+###### Parameters
+
+*   `referenceIndex` (`number`)
+    — index of the definition in the order that they are first referenced,
+    0-indexed
+*   `rereferenceIndex` (`number`)
+    — index of calls to the same definition, 0-indexed
+
+###### Returns
+
+Back label to use when linking back from definitions to their reference
+(`string`).
+
+### `HtmlOptions`
+
+Configuration (TypeScript type).
+
+##### Fields
+
+###### `clobberPrefix`
+
+Prefix to use before the `id` attribute on footnotes to prevent them from
+*clobbering* (`string`, default: `'user-content-'`).
+
+Pass `''` for trusted markdown and when you are careful with polyfilling.
+You could pass a different prefix.
+
+DOM clobbering is this:
+
+```html
+<p id="x"></p>
+<script>alert(x) // `x` now refers to the `p#x` DOM element</script>
+```
+
+The above example shows that elements are made available by browsers, by their
+ID, on the `window` object.
+This is a security risk because you might be expecting some other variable at
+that place.
+It can also break polyfills.
+Using a prefix solves these problems.
+
+###### `label`
+
+Textual label to use for the footnotes section (`string`, default:
+`'Footnotes'`).
+
+Change it when the markdown is not in English.
+
+This label is typically hidden visually (assuming a `sr-only` CSS class
+is defined that does that) and so affects screen readers only.
+
+###### `labelAttributes`
+
+Attributes to use on the footnote label (`string`, default:
+`'class="sr-only"'`).
+
+Change it to show the label and add other attributes.
+
+This label is typically hidden visually (assuming an `sr-only` CSS class
+is defined that does that) and so affects screen readers only.
+If you do have such a class, but want to show this section to everyone,
+pass an empty string.
+You can also add different attributes.
+
+> 👉 **Note**: `id="footnote-label"` is always added, because footnote
+> calls use it with `aria-describedby` to provide an accessible label.
+
+###### `labelTagName`
+
+HTML tag name to use for the footnote label element (`string`, default:
+`'h2'`).
+
+Change it to match your document structure.
+
+This label is typically hidden visually (assuming a `sr-only` CSS class
+is defined that does that) and so affects screen readers only.
+
+###### `backLabel`
+
+Textual label to describe the backreference back to footnote calls
+([`BackLabelTemplate`][api-back-label-template] or `string`,
+default: [`defaultBackLabel`][api-default-back-label]).
+
+Change it when the markdown is not in English.
+
+This label is used in the [`aria-label`][aria-label] attribute on each
+backreference (the `↩` links).
+It affects users of assistive technology.
+
+## Bugs
+
+GitHub’s own algorithm to parse footnote definitions contains several bugs.
+These are not present in this project.
+The issues relating to footnote definitions are:
+
+*   [Footnote reference call identifiers are trimmed, but definition
+    identifiers aren’t](https://github.com/github/cmark-gfm/issues/237)\
+    — initial and final whitespace in labels causes them not to match
+*   [Footnotes are matched case-insensitive, but links keep their casing,
+    breaking them](https://github.com/github/cmark-gfm/issues/239)\
+    — using uppercase (or any character that will be percent encoded) in
+    identifiers breaks links
+*   [Colons in footnotes generate links w/o
+    `href`](https://github.com/github/cmark-gfm/issues/250)\
+    — colons in identifiers generate broken links
+*   [Character escape of `]` does not work in footnote
+    identifiers](https://github.com/github/cmark-gfm/issues/240)\
+    — some character escapes don’t work
+*   [Footnotes in links are
+    broken](https://github.com/github/cmark-gfm/issues/249)\
+    — while `CommonMark` prevents links in links, GitHub does not prevent
+    footnotes (which turn into links) in links
+*   [Footnote-like brackets around image, break that
+    image](https://github.com/github/cmark-gfm/issues/275)\
+    — images can’t be used in what looks like a footnote call
+*   [GFM footnotes: line ending in footnote definition label causes text to
+    disappear](https://github.com/github/cmark-gfm/issues/282)\
+    — line endings in footnote definitions cause text to disappear
+
+## Authoring
+
+When authoring markdown with footnotes it’s recommended to use words instead
+of numbers (or letters or anything with an order) as identifiers.
+That makes it easier to reuse and reorder footnotes.
+
+It’s recommended to place footnotes definitions at the bottom of the document.
+
+## HTML
+
+GFM footnotes do not, on their own, relate to anything in HTML.
+When a footnote reference matches with a definition, they each relate to several
+elements in HTML.
+
+The reference relates to `<sup>` and `<a>` elements in HTML:
+
+```html
+<sup><a href="#user-content-fn-x" id="user-content-fnref-x" data-footnote-ref="" aria-describedby="footnote-label">1</a></sup></p>
+```
+
+…where `x` is the identifier used in the markdown source and `1` the number of
+corresponding, listed, definition.
+
+See [*§ 4.5.19 The `sub` and `sup` elements*][html-sup],
+[*§ 4.5.1 The `a` element*][html-a], and
+[*§ 3.2.6.6 Embedding custom non-visible data with the `data-*`
+attributes*][html-data]
+in the HTML spec, and
+[*§ 6.8 `aria-describedby` property*][aria-describedby]
+in WAI-ARIA, for more info.
+
+When one or more definitions are referenced, a footnote section is generated at
+the end of the document, using `<section>`, `<h2>`, and `<ol>` elements:
+
+```html
+<section data-footnotes="" class="footnotes"><h2 id="footnote-label" class="sr-only">Footnotes</h2>
+<ol>…</ol>
+</section>
+```
+
+Each definition is generated as a `<li>` in the `<ol>` in the order they were
+first referenced:
+
+```html
+<li id="user-content-fn-1">…</li>
+```
+
+Backreferences are injected at the end of the first paragraph, or, when there
+is no paragraph, at the end of the definition.
+When a definition is referenced multiple times, multiple backreferences are
+generated.
+Further backreferences use an extra counter in the `href` attribute and
+visually in a `<span>` after `↩`.
+
+```html
+<a href="#user-content-fnref-1" data-footnote-backref="" class="data-footnote-backref" aria-label="Back to content">↩</a> <a href="#user-content-fnref-1-2" data-footnote-backref="" class="data-footnote-backref" aria-label="Back to content">↩<sup>2</sup></a>
+```
+
+See
+[*§ 4.5.1 The `a` element*][html-a],
+[*§ 4.3.6 The `h1`, `h2`, `h3`, `h4`, `h5`, and `h6` elements*][html-h],
+[*§ 4.4.8 The `li` element*][html-li],
+[*§ 4.4.5 The `ol` element*][html-ol],
+[*§ 4.4.1 The `p` element*][html-p],
+[*§ 4.3.3 The `section` element*][html-section], and
+[*§ 4.5.19 The `sub` and `sup` elements*][html-sup]
+in the HTML spec, and
+[*§ 6.8 `aria-label` property*][aria-label]
+in WAI-ARIA, for more info.
+
+## CSS
+
+The following CSS is needed to make footnotes look a bit like GitHub (and fixes
+a bug).
+For the complete actual CSS see
+[`sindresorhus/github-markdown-css`](https://github.com/sindresorhus/github-markdown-css).
+
+```css
+/* Style the footnotes section. */
+.footnotes {
+  font-size: smaller;
+  color: #8b949e;
+  border-top: 1px solid #30363d;
+}
+
+/* Hide the section label for visual users. */
+.sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  word-wrap: normal;
+  border: 0;
+}
+
+/* Place `[` and `]` around footnote references. */
+[data-footnote-ref]::before {
+  content: '[';
+}
+
+[data-footnote-ref]::after {
+  content: ']';
+}
+```
+
+## Syntax
+
+Footnotes form with, roughly, the following BNF:
+
+```bnf
+gfm_footnote_reference ::= gfm_footnote_label
+
+gfm_footnote_definition_start ::= gfm_footnote_label ':' *space_or_tab
+; Restriction: blank line allowed.
+gfm_footnote_definition_cont ::= 4(space_or_tab)
+
+; Restriction: maximum `999` codes between `^` and `]`.
+gfm_footnote_label ::= '[' '^' 1*(gfm_footnote_label_byte | gfm_footnote_label_escape) ']'
+gfm_footnote_label_byte ::= text - '[' - '\\' - ']'
+gfm_footnote_label_escape ::= '\\' ['[' | '\\' | ']']
+
+; Any byte (u8)
+byte ::= 0x00..=0xFFFF
+space_or_tab ::= '\t' | ' '
+eol ::= '\n' | '\r' | '\r\n'
+line ::= byte - eol
+text ::= line - space_or_tab
+```
+
+Further lines after `gfm_footnote_definition_start` that are not prefixed with
+`gfm_footnote_definition_cont` cause the footnote definition to be exited,
+except when those lines are lazy continuation or blank.
+Like so many things in markdown, footnote definition too are complex.
+See [*§ Phase 1: block structure* in `CommonMark`][commonmark-block] for more
+on parsing details.
+
+The identifiers in the `label` parts are interpreted as the
+[string][micromark-content-types] content type.
+That means that character escapes and character references are allowed.
+
+Definitions match to references through identifiers.
+To match, both labels must be equal after normalizing with
+[`normalizeIdentifier`][micromark-normalize-identifier].
+One definition can match to multiple calls.
+Multiple definitions with the same, normalized, identifier are ignored: the
+first definition is preferred.
+To illustrate, the definition with the content of `x` wins:
+
+```markdown
+[^a]: x
+[^a]: y
+
+[^a]
+```
+
+Importantly, while labels *can* include [string][micromark-content-types]
+content (character escapes and character references), these are not considered
+when matching.
+To illustrate, neither definition matches the reference:
+
+```markdown
+[^a&amp;b]: x
+[^a\&b]: y
+
+[^a&b]
+```
+
+Because footnote definitions are containers (like block quotes and list items),
+they can contain more footnote definitions.
+They can even include references to themselves.
+
+## Types
+
+This package is fully typed with [TypeScript][].
+It exports the additional types [`BackLabelTemplate`][api-back-label-template]
+and [`HtmlOptions`][api-html-options].
+
+## Compatibility
+
+Projects maintained by the unified collective are compatible with maintained
+versions of Node.js.
+
+When we cut a new major release, we drop support for unmaintained versions of
+Node.
+This means we try to keep the current release line,
+`micromark-extension-gfm-footnote@^2`, compatible with Node.js 16.
+
+This package works with `micromark` version `3` and later.
+
+## Security
+
+This package is safe.
+Setting `clobberPrefix = ''` is dangerous, it opens you up to DOM clobbering.
+The `labelTagName` and `labelAttributes` options are unsafe when used with user
+content, they allow defining arbitrary HTML.
+
+## Related
+
+*   [`micromark-extension-gfm`][micromark-extension-gfm]
+    — support all of GFM
+*   [`mdast-util-gfm-footnote`][mdast-util-gfm-footnote]
+    — support all of GFM in mdast
+*   [`mdast-util-gfm`][mdast-util-gfm]
+    — support all of GFM in mdast
+*   [`remark-gfm`][remark-gfm]
+    — support all of GFM in remark
+
+## Contribute
+
+See [`contributing.md` in `micromark/.github`][contributing] for ways to get
+started.
+See [`support.md`][support] for ways to get help.
+
+This project has a [code of conduct][coc].
+By interacting with this repository, organization, or community you agree to
+abide by its terms.
+
+## License
+
+[MIT][license] © [Titus Wormer][author]
+
+<!-- Definitions -->
+
+[build-badge]: https://github.com/micromark/micromark-extension-gfm-footnote/workflows/main/badge.svg
+
+[build]: https://github.com/micromark/micromark-extension-gfm-footnote/actions
+
+[coverage-badge]: https://img.shields.io/codecov/c/github/micromark/micromark-extension-gfm-footnote.svg
+
+[coverage]: https://codecov.io/github/micromark/micromark-extension-gfm-footnote
+
+[downloads-badge]: https://img.shields.io/npm/dm/micromark-extension-gfm-footnote.svg
+
+[downloads]: https://www.npmjs.com/package/micromark-extension-gfm-footnote
+
+[size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size&query=$.size.compressedSize&url=https://deno.bundlejs.com/?q=micromark-extension-gfm-footnote
+
+[size]: https://bundlejs.com/?q=micromark-extension-gfm-footnote
+
+[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg
+
+[backers-badge]: https://opencollective.com/unified/backers/badge.svg
+
+[collective]: https://opencollective.com/unified
+
+[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg
+
+[chat]: https://github.com/micromark/micromark/discussions
+
+[npm]: https://docs.npmjs.com/cli/install
+
+[esmsh]: https://esm.sh
+
+[license]: license
+
+[author]: https://wooorm.com
+
+[contributing]: https://github.com/micromark/.github/blob/main/contributing.md
+
+[support]: https://github.com/micromark/.github/blob/main/support.md
+
+[coc]: https://github.com/micromark/.github/blob/main/code-of-conduct.md
+
+[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c
+
+[typescript]: https://www.typescriptlang.org
+
+[development]: https://nodejs.org/api/packages.html#packages_resolving_user_conditions
+
+[micromark]: https://github.com/micromark/micromark
+
+[micromark-content-types]: https://github.com/micromark/micromark#content-types
+
+[micromark-extension]: https://github.com/micromark/micromark#syntaxextension
+
+[micromark-html-extension]: https://github.com/micromark/micromark#htmlextension
+
+[micromark-normalize-identifier]: https://github.com/micromark/micromark/tree/main/packages/micromark-util-normalize-identifier
+
+[micromark-extension-gfm]: https://github.com/micromark/micromark-extension-gfm
+
+[mdast-util-gfm-footnote]: https://github.com/syntax-tree/mdast-util-gfm-footnote
+
+[mdast-util-gfm]: https://github.com/syntax-tree/mdast-util-gfm
+
+[remark-gfm]: https://github.com/remarkjs/remark-gfm
+
+[post]: https://github.blog/changelog/2021-09-30-footnotes-now-supported-in-markdown-fields/
+
+[cmark-gfm]: https://github.com/github/cmark-gfm
+
+[commonmark-block]: https://spec.commonmark.org/0.30/#phase-1-block-structure
+
+[html-a]: https://html.spec.whatwg.org/multipage/text-level-semantics.html#the-a-element
+
+[html-data]: https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes
+
+[html-h]: https://html.spec.whatwg.org/multipage/sections.html#the-h1,-h2,-h3,-h4,-h5,-and-h6-elements
+
+[html-li]: https://html.spec.whatwg.org/multipage/grouping-content.html#the-li-element
+
+[html-ol]: https://html.spec.whatwg.org/multipage/grouping-content.html#the-ol-element
+
+[html-p]: https://html.spec.whatwg.org/multipage/grouping-content.html#the-p-element
+
+[html-section]: https://html.spec.whatwg.org/multipage/sections.html#the-section-element
+
+[html-sup]: https://html.spec.whatwg.org/multipage/text-level-semantics.html#the-sub-and-sup-elements
+
+[aria-describedby]: https://w3c.github.io/aria/#aria-describedby
+
+[aria-label]: https://w3c.github.io/aria/#aria-label
+
+[api-gfm-footnote]: #gfmfootnote
+
+[api-gfm-footnote-html]: #gfmfootnotehtmloptions
+
+[api-html-options]: #htmloptions
+
+[api-default-back-label]: #defaultbacklabelreferenceindex-rereferenceindex
+
+[api-back-label-template]: #backlabeltemplate