having a timeout for mobx's when?

Question

Is there a clean way for a mobx when() call to fire after a timeout even if the predicate hasn't been true?

I could set an observable after a setTimeout and check that in the predicate, but then I'd have more to clean up. when has an options parameter but I haven't found the documentation for it.

Answer 1

Use whenWithTimeout from mobx-utils package

If you are using MobX 4.0.0 or higher you can just pass timeout directly to when as its option (3rd parameter). It has been mentioned in the changelog