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types.isWeakMap - util - Node documentation
function types.isWeakMap

Usage in Deno

import { types } from "node:util";
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

Return Type

object is WeakMap<object, unknown>