This tutorial provides a comprehensive guide to JavaScript Map and Set, explaining their differences, use cases, and how to use them.

JavaScript introduced Map and Set objects with new ES6. Map provides functionality to use objects as object key. Set is a unique collection of items. This implementation uses hash tables to identify ...

Fast & Light Map, WeakMap, Set, & WeakSet Polyfill This is a fast, lightweight (~1.94kb ungzipped, and only 703 bytes gziped) JavaScript Map and Weakmap polyfill.