Deno.close - Deno documentation
function Deno.close
close(rid: number): void

This will be removed in Deno 2.0. See the Deno 1.x to 2.x Migration Guide for migration instructions.

Close the given resource ID (rid) which has been previously opened, such as via opening or creating a file. Closing a file when you are finished with it is important to avoid leaking resources.

const file = await"my_file.txt");
// do work with "file" object

It is recommended to define the variable with the using keyword so the runtime will automatically close the resource when it goes out of scope. Doing so negates the need to manually close the resource.

using file = await"my_file.txt");
// do work with "file" object


rid: number

Return Type