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30-seconds-of-code/snippets/js/s/word-wrap.md
2023-05-07 16:07:29 +03:00

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---
title: Word wrap string
type: snippet
language: javascript
tags: [string,regexp]
cover: white-tablet
dateModified: 2020-10-22T20:24:44+03:00
---
Wraps a string to a given number of characters using a string break character.
- Use `String.prototype.replace()` and a regular expression to insert a given break character at the nearest whitespace of `max` characters.
- Omit the third argument, `br`, to use the default value of `'\n'`.
```js
const wordWrap = (str, max, br = '\n') => str.replace(
new RegExp(`(?![^\\n]{1,${max}}$)([^\\n]{1,${max}})\\s`, 'g'), '$1' + br
);
```
```js
wordWrap(
'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce tempus.',
32
);
// 'Lorem ipsum dolor sit amet,\nconsectetur adipiscing elit.\nFusce tempus.'
wordWrap(
'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce tempus.',
32,
'\r\n'
);
// 'Lorem ipsum dolor sit amet,\r\nconsectetur adipiscing elit.\r\nFusce tempus.'
```