🧠 Stop hoarding memory in your JS apps.

In 2025, WeakMap and WeakSet are your secret weapons for smarter caching and cleanup.

🔍 Real-world patterns covered:
✅ Auto-cleaning animation state
✅ Layout cache that vanishes with the DOM
✅ Blocking form resubmits — no cleanup needed
✅ Component data fetch guard without memory leaks

🧼 No manual .delete(), no stale flags. Just garbage-collector magic.

📖 Clean examples + when to use (and when not):
https://javascript.plainenglish.io/smart-caching-in-2025-weakmap-weakset-for-modern-web-apps-8b2080dd2c54