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Think of WeakSet as a self-cleaning membership list! It's like a Set but only stores objects, and when those objects are no longer needed in your code, they're automatically removed from the WeakSet. Perfect for tracking objects without preventing garbage collection!
Can only store objects. No strings, numbers, or other primitives allowed!
When an object is garbage collected, it's automatically removed from WeakSet!
Can't loop through values! No size, no forEach().
Perfect for tracking objects without preventing them from being garbage collected!
add(object)Add an object
has(object)Check if exists
delete(object)Remove object
Mark objects as processed without memory leaks
Track which elements have been initialized
Only objects allowed. Strings, numbers, booleans won't work!
No .size, no .values(), no .forEach(). Can't see what's inside or loop through!
If you could see all objects in WeakSet, they couldn't be garbage collected! The limitations exist to enable automatic memory management.
Can only store objects - no primitives allowed
Objects are removed when garbage collected
Perfect for tracking without preventing garbage collection
Only add, has, delete - no iteration!