truncate - node__fs.d.ts - Node

function truncate

Usage in Deno

```typescript import { truncate } from "node:node__fs.d.ts"; ```



truncate(path: PathLike,
len: number
 | undefined
 | null,
callback: NoParamCallback,
): void

Truncates the file. No arguments other than a possible exception are given to the completion callback. A file descriptor can also be passed as the first argument. In this case, `fs.ftruncate()` is called. ```js import { truncate } from 'node:fs'; // Assuming that 'path/file.txt' is a regular file. truncate('path/file.txt', (err) => { if (err) throw err; console.log('path/file.txt was truncated'); }); ``` Passing a file descriptor is deprecated and may result in an error being thrown in the future. See the POSIX [`truncate(2)`](http://man7.org/linux/man-pages/man2/truncate.2.html) documentation for more details.

Parameters



path: PathLike

optional



len: number
 | undefined
 | null = 0



callback: NoParamCallback

Return Type

void



truncate(path: PathLike,
callback: NoParamCallback,
): void

Asynchronous truncate(2) - Truncate a file to a specified length.

Parameters



path: PathLike

A path to a file. If a URL is provided, it must use the `file:` protocol.



callback: NoParamCallback

Return Type

void