type-fest/source/trim.d.ts

A collection of essential TypeScript types

import type {Whitespace} from './internal';

/**
Remove spaces from the left side.
*/
type TrimLeft<V extends string> = V extends `${Whitespace}${infer R}` ? TrimLeft<R> : V;

/**
Remove spaces from the right side.
*/
type TrimRight<V extends string> = V extends `${infer R}${Whitespace}` ? TrimRight<R> : V;

/**
Remove leading and trailing spaces from a string.

@example
```
import type {Trim} from 'type-fest';

Trim<' foo '>
//=> 'foo'
```

@category String
@category Template literal
*/
export type Trim<V extends string> = TrimLeft<TrimRight<V>>;