⇢ weak-utils

weak-utils is a zero-dependency lightweight library written in TypeScript that provides weak reference utilities.

What does this do?

weak-utils has 3 components:

• IterableWeakMap<object, any> - An iterable weak map
• IterableWeakSet<object> - An iterable weak set
• WeakProxy<object> - A constructor that creates weak proxies over a target object which is weakly referenced and has support for a the standard proxy handlers and in addition to a finalizer method.

Usage

IterableWeakMap<object, any>

Use as you would a regular Map or WeakMap. Has all methods of Map.

IterableWeakSet<object>

Use as you would a regular Set or WeakSet. Has all methods of Set.

WeakProxy<object>

Use as you would a regular a regular proxy, supports revocable proxies as well.

This object works by registering a finalizer for the target value via FinalizationRegistry(), then, when the target value is collected, the proxy is revoked.

The use cases for weak proxies are currently unknown in JS, I added this feature as the result of an experiment. To register a finalizer method, pass a finalize() method in the handler object.