es6‑weak‑map is a lightweight JavaScript polyfill that implements the ECMAScript 6 WeakMap collection for environments that lack native support. It provides the standard WeakMap API (set, get, has, delete) and can be required as a module, used to patch the global object, or forced as a polyfill, making it useful for Node.js projects and browser bundles that need reliable weak‑reference maps on ES5‑compatible runtimes.