isWeakSet

Checks if a given value is a WeakSet instance.

const result = isWeakSet(value);

Reference

isWeakSet(value)

Use isWeakSet when you want to check if a value is a WeakSet instance.

import { isWeakSet } from 'es-toolkit/predicate';

// WeakSet instances
const weakSet1 = new WeakSet();
const weakSet2 = new WeakSet([{}, []]);

console.log(isWeakSet(weakSet1)); // true
console.log(isWeakSet(weakSet2)); // true

// Non-WeakSet values
console.log(isWeakSet(new Set())); // false
console.log(isWeakSet(new Map())); // false
console.log(isWeakSet(new WeakMap())); // false
console.log(isWeakSet([])); // false
console.log(isWeakSet({})); // false
console.log(isWeakSet(null)); // false
console.log(isWeakSet(undefined)); // false

Parameters

• value (unknown): The value to check if it's a WeakSet instance.

Returns

(value is WeakSet<WeakKey>): Returns true if the value is a WeakSet instance, false otherwise.