weak-utils is a zero-dependency lightweight library written in TypeScript that provides weak reference utilities.
weak-utils has 3 components:
IterableWeakMap<object, any>- An iterable weak mapIterableWeakSet<object>- An iterable weak setWeakProxy<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.
Use as you would a regular Map or WeakMap. Has all methods of Map.
Use as you would a regular Set or WeakSet. Has all methods of Set.
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.