---
title: toTitleCase
tags: string,regexp,intermediate
firstSeen: 2018-10-19T04:49:34+03:00
lastUpdated: 2020-10-22T20:24:44+03:00
---

Converts a string to title case.

- Use `String.prototype.match()` to break the string into words using an appropriate regexp.
- Use `Array.prototype.map()`, `Array.prototype.slice()`, `Array.prototype.join()` and `String.prototype.toUpperCase()` to combine them, capitalizing the first letter of each word and adding a whitespace between them.

```js
const toTitleCase = str =>
  str
    .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
    .map(x => x.charAt(0).toUpperCase() + x.slice(1))
    .join(' ');
```

```js
toTitleCase('some_database_field_name'); // 'Some Database Field Name'
toTitleCase('Some label that needs to be title-cased');
// 'Some Label That Needs To Be Title Cased'
toTitleCase('some-package-name'); // 'Some Package Name'
toTitleCase('some-mixed_string with spaces_underscores-and-hyphens');
// 'Some Mixed String With Spaces Underscores And Hyphens'
```