isWeakMap - util/types - Node

isWeakMap - util/types - Node documentation

function isWeakMap

import { isWeakMap } from "node:util/types";



isWeakMap(object: unknown): object is WeakMap<object, unknown>

Returns true if the value is a built-in WeakMap instance.

util.types.isWeakMap(new WeakMap());  // Returns true

Parameters



object: unknown

object is WeakMap<object, unknown>