Which current text? I wasn't able to find any mention of WeakRef in javascript.info.

What do you fail to understand from the current text?

I can ask same question regarding any article on javascript.info: what do I fail to understand on MDN so that I read javascript.info. I like human-friendly, more detailed and more practical approach here.

In particular, there's not so many good sources on WeakRefs on the web, the main 3 are:

What's missing:

good use-cases and examples to build intuition around them. There's only 3 main examples: binding event listeners, caching and iterable WeakMap.
practical questions/understanding:
- when is it better to remove listeners/unsubscribe - when .deref() returns undefined, or in FinalizationRegistry?
- what's the difference between .deref() === undefined and FinalizationRegistry callback? Is that called at different times?
- what's possible patterns organizing weak event subscriptions? Wrapping listener into deref-function, as in v8 example, or maybe storing a list of weakrefs? Which one will and which will not be collected by gc?
- why is it said in the proposal that iterable WeakMap cannot store WeakRef instances as keys, else it won't be collected?
- what's the right object to use for FinalizationRegistry - event source or event listener?
How to test WeakRefs? (turns out there's --expose-gc option for node and global.gc() call, or even more secret --allow-natives-syntax with %CollectGarbage('all').
Possible pitfalls, like - why object is not being garbage-collected (soft references in fn contexts) etc.

I think all that and more could be a good help for newcomers if covered in a separate tutorial.
Wdyt?

WeakRef tutorial #2831

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