added README.md

README.md

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+# vikingowls-ts-snippets
+## A collection of often used typescript snippets
+
+---
+
+### Utils
+#### sleep()
+The sleep function takes the time to sleep in milliseconds.
+```ts
+import { sleep } from "vikingowls-ts-snippets";
+
+sleep(2000).then(any => {
+  // do-something
+})
+```
+
+---
+
+### Dom Utils
+#### addGlobalEventListener()
+The addGlobalEventListener function takes a type (string), a selector (string), a callback function, options (boolean or AddEventListenerOptions), and a parent (DOM or querySelector, etc)
+
+```ts
+import {addGlobalEventListener, qs} from "./domUtils";
+
+addGlobalEventListener(
+    "click",
+    ".btn",
+    () => console.log("Run once"),
+    {once: true}
+)
+
+addGlobalEventListener(
+    "click",
+    ".btn",
+    () => console.log("Only works inside the wrapper class"),
+    {},
+    qs(".wrapper")
+)
+```
+#### qs()
+The qs function takes a selector (string) and a parent (DOM etc)
+
+```ts
+import {qs} from "./domUtils";
+
+// instead of document.querySelector(".btn")
+qs(".btn")
+```
+#### qsa()
+The qsa function takes a selector (string) and a parent (DOM etc) and returns an Array of Elements
+
+```ts
+import {qsa} from "./domUtils";
+
+// instead of document.querySelectorAll(".btn")
+qsa(".btn")
+```
+---
+
+### Formatters
+#### formatCurrency()
+The formatCurrency function takes a number and a currency (as shown).
+The output defaults to the locale set in the browser but can be set manually.
+```ts
+import { formatCurrency } from "vikingowls-ts-snippets";
+
+formatCurrency(9_123_456.789123, "EUR", "de-de")
+// prints in germany "9.123.456,79 €"
+formatCurrency(9_123_456.789123, "USD")
+// prints in usa "$9,123,456.79"
+```
+#### formatNumber()
+The formatNumber function takes a number.
+The output defaults to the locale set in the browser but can be set manually.
+```ts
+import { formatNumber } from "vikingowls-ts-snippets";
+
+formatNumber(9_123_456.789123, "de-de")
+// prints in germany "9.123.456,789"
+formatNumber(9_123_456.789123)
+// prints in usa "9,123,456.789"
+```
+#### formatCompactNumber()
+The formatCompactNumber function takes a number.
+The output defaults to the locale set in the browser but can be set manually.
+```ts
+import { formatCompactNumber } from "vikingowls-ts-snippets";
+
+formatCompactNumber(9_123_456.789123, "de-de")
+// prints in germany "9,1 Mio."
+formatCompactNumber(9_123_456.789123)
+// prints in usa "9.1M"
+```
+#### formatRelativeDate()
+The formatRelativeDate function takes a Date (end Date).
+You also can set a default 'start Date'.
+The output defaults to the locale set in the browser but can be set manually.
+```ts
+import { formatRelativeDate } from "vikingowls-ts-snippets";
+
+formatRelativeDate(new Date().getSeconds() - 20000, new Date().getSeconds(), "de-de")
+// prints in germany "vor 20 Sekunden"
+formatRelativeDate(new Date().getSeconds() - 20000, new Date().getSeconds())
+// prints in usa "20 seconds ago"
+```