@nick/is/closer

isCloser

Signature

function isCloser(it: unknown): it is Closer;

Checks if a given value implments the Deno.Closer interface, which means it has a close method that can be called to release associated resources.

Parameters

Name	Info
it	The value to check.

Returns

true if the value implements Deno.Closer, false otherwise.

Category

I/O

Examples

import { isCloser } from "jsr:@nick/is/closer";

const file = await Deno.open("file.txt");
isCloser(file); // true

const socket = new WebSocket("ws://example.com");
isCloser(socket); // true

Closer

An abstract interface which when implemented provides an interface to close files/resources that were previously opened.

Category

I/O

Methods

close

close(): void;

Closes the resource, "freeing" the backing file/resource.

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