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30-seconds-of-code/snippets/normalizeLineEndings.md
2020-05-04 12:33:13 +03:00

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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'
```