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javascript/snippets/word-wrap.md

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+---
+title: Word wrap string
+type: snippet
+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.'
+```