truncate - fs - Node

function truncate

Usage in Deno

import { truncate } from "node:fs";



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.

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) 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