Node Underground

Nov 30, 2019 · Frontend Development

Unlocking JavaScript’s WeakMap & WeakSet: Memory‑Smart Patterns for Developers

This article explains the rarely understood ES6 features WeakMap and WeakSet, compares them to Java’s weak references, and demonstrates practical Node.js and front‑end use cases such as memory‑safe context storage, result caching, and tracking unhandled promise rejections.