Deno.truncate
Truncates or extends the specified file, to reach the specified len
. If len
is not specified then the entire file contents are truncated.
// truncate the entire file
await Deno.truncate("my_file.txt");
// truncate part of the file
const file = await Deno.makeTempFile();
await Deno.writeFile(file, new TextEncoder().encode("Hello World"));
await Deno.truncate(file, 7);
const data = await Deno.readFile(file);
console.log(new TextDecoder().decode(data)); // "Hello W"
Requires allow-write
permission.
function
truncate(
name: string
,
len?: number)
: Promise<void>;
truncate(
name: string
,
len?: number)
: Promise<void>
Parameters
name: string
len?: number
optional
Return Type
Promise<void>
© 2018–2022 the Deno authors
https://doc.deno.land/deno/stable/~/Deno.truncate