side-channel-weakmap/index.d.ts

Store information about any JS value in a side channel. Uses WeakMap if available.

declare namespace getSideChannelWeakMap {
	type Channel<K, V> = {
		assert: (key: K) => void;
		has: (key: K) => boolean;
		get: (key: K) => V | undefined;
		set: (key: K, value: V) => void;
		delete: (key: K) => boolean;
	}
}

declare function getSideChannelWeakMap<K, V>(): getSideChannelWeakMap.Channel<K, V>;

declare const x: false | typeof getSideChannelWeakMap;

export = x;