Usage

isWeakSet(new WeakSet()); // => true
isWeakSet(new Set()); // => false

Installation

CLI

npx atmx add helper is-weak-set

Manually

Copy and paste the following method into @/utils/helpers/isWeakSet.ts:

import { isTagged } from "@/helpers/is-tagged.ts";

/**
* Checks if the given value is a WeakSet.
*
* Instances from [other realms][1] are also supported.
*
* [1]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/instanceof#instanceof_and_multiple_realms
*
* @example
*
* isWeakSet(new WeakSet()) // => true
* isWeakSet(new Set()) // => false
*/
export function isWeakSet<T extends WeakKey = WeakKey>(
value: unknown,
): value is WeakSet<T> {
return isTagged(value, "[object WeakSet]");
}