Add normalizeLineEndings

snippets/normalizeLineEndings.md

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+---
+title: normalizeLineEndings
+tags: array,intermediate
+---
+
+Normalizes line endings in a string.
+
+Use `String.prototype.replace()` and a regular expression to match and replace line endings with the `normalized` version.
+Omit the seconds argument, `normalized`, to use the default value of `'\r\n'`.
+
+```js
+const normalizeLineEndings = (str, normalized = '\r\n') => str.replace(/\r?\n/g, normalized);
+```
+
+```js
+splitLines('This\r\nis a\nmultiline\nstring.\r\n'); // 'This\r\nis a\r\nmultiline\r\nstring.\r\n'
+splitLines('This\r\nis a\nmultiline\nstring.\r\n', '\n'); // 'This\nis a\nmultiline\nstring.\n'
+```