---
url: >-
  https://canary.warp-drive.io/api/@warp-drive/utilities/string/functions/capitalize.md
description: >-
  Uppercases the first letter of a string, and of each `/`-separated path
  segment, leaving the rest unchanged.
---

#  capitalize() 

```ts
function capitalize(str: string): string;
```

Defined in: [-private/string/transform.ts:104](https://github.com/warp-drive-data/warp-drive/blob/4418225138f47a5fe1f4d7ca2b61c01e985a415d/warp-drive-packages/utilities/src/-private/string/transform.ts#L104)

Returns the Capitalized form of a string

```js
import { capitalize } from '@warp-drive/utilities/string';

capitalize('innerHTML')                 // 'InnerHTML'
capitalize('action_name')               // 'Action_name'
capitalize('css-class-name')            // 'Css-class-name'
capitalize('my favorite items')         // 'My favorite items'
capitalize('privateDocs/ownerInvoice'); // 'PrivateDocs/ownerInvoice'
```

## Parameters

### str

`string`

## Returns

`string`