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2025-11-28 19:45:44 -07:00

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TypeScript

/**
* Checks if the given value is a `WeakSet`.
*
* This function tests whether the provided value is an instance of `WeakSet`.
* It returns `true` if the value is a `WeakSet`, and `false` otherwise.
*
* This function can also serve as a type predicate in TypeScript, narrowing the type of the argument to `WeakSet`.
*
* @param {unknown} value - The value to test if it is a `WeakSet`.
* @returns {value is WeakSet<WeakKey>} true if the value is a `WeakSet`, false otherwise.
*
* @example
* const value1 = new WeakSet();
* const value2 = new Map();
* const value3 = new Set();
*
* console.log(isWeakSet(value1)); // true
* console.log(isWeakSet(value2)); // false
* console.log(isWeakSet(value3)); // false
*/
declare function isWeakSet(value: unknown): value is WeakSet<WeakKey>;
export { isWeakSet };