4 ms·

You can kinda use a WeakMap to later detect if an object has been dereferenced, and thus run some sorta cleanup routine.

• recursive 3y ago
  How? WeakMap (and WeakSet, more directly) can detect if an object has been collected only if you have a reference to pass to it. If you have reference to the object in a variable or data structure, it won't have been eligible for collection in the first place.
  • bakkoting 3y ago
    You can't use a WeakMap or a WeakSet, but you can use a WeakRef or a FinalizationRegistry.
    • recursive 3y ago
      I did not know about these things. Looks cool!