up n_m

node_modules/@docusaurus/theme-classic/lib/theme/BlogPostPage/Metadata/index.js

@@ -0,0 +1,41 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+import React from 'react';
+import {PageMetadata} from '@docusaurus/theme-common';
+import {useBlogPost} from '@docusaurus/theme-common/internal';
+export default function BlogPostPageMetadata() {
+  const {assets, metadata} = useBlogPost();
+  const {title, description, date, tags, authors, frontMatter} = metadata;
+  const {keywords} = frontMatter;
+  const image = assets.image ?? frontMatter.image;
+  return (
+    <PageMetadata
+      title={title}
+      description={description}
+      keywords={keywords}
+      image={image}>
+      <meta property="og:type" content="article" />
+      <meta property="article:published_time" content={date} />
+      {/* TODO double check those article meta array syntaxes, see https://ogp.me/#array */}
+      {authors.some((author) => author.url) && (
+        <meta
+          property="article:author"
+          content={authors
+            .map((author) => author.url)
+            .filter(Boolean)
+            .join(',')}
+        />
+      )}
+      {tags.length > 0 && (
+        <meta
+          property="article:tag"
+          content={tags.map((tag) => tag.label).join(',')}
+        />
+      )}
+    </PageMetadata>
+  );
+}