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Deno.writeFile - Deno documentation
function Deno.writeFile
allow-read
allow-write
writeFile(
path: string | URL,
data: Uint8Array | ReadableStream<Uint8Array>,
options?: WriteFileOptions,
): Promise<void>

Write data to the given path, by default creating a new file if needed, else overwriting.

const encoder = new TextEncoder();
const data = encoder.encode("Hello world\n");
await Deno.writeFile("hello1.txt", data);  // overwrite "hello1.txt" or create it
await Deno.writeFile("hello2.txt", data, { create: false });  // only works if "hello2.txt" exists
await Deno.writeFile("hello3.txt", data, { mode: 0o777 });  // set permissions on new file
await Deno.writeFile("hello4.txt", data, { append: true });  // add data to the end of the file

Requires allow-write permission, and allow-read if options.create is false.

Parameters

path: string | URL
data: Uint8Array | ReadableStream<Uint8Array>
optional
options: WriteFileOptions

Return Type

Promise<void>