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snippets/js/s/normalize-line-endings.md

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+---
+title: Normalize line endings
+type: snippet
+language: javascript
+tags: [string,regexp]
+author: chalarangelo
+cover: red-light
+dateModified: 2020-10-21T21:54:53+03:00
+---
+
+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 second argument, `normalized`, to use the default value of `'\r\n'`.
+
+```js
+const normalizeLineEndings = (str, normalized = '\r\n') =>
+  str.replace(/\r?\n/g, normalized);
+```
+
+```js
+normalizeLineEndings('This\r\nis a\nmultiline\nstring.\r\n');
+// 'This\r\nis a\r\nmultiline\r\nstring.\r\n'
+normalizeLineEndings('This\r\nis a\nmultiline\nstring.\r\n', '\n');
+// 'This\nis a\nmultiline\nstring.\n'
+```