Notify on setting identical value

[gismya]

If you want to run the event listener callbacks onSet when the value is the same as the previous value, what's the best way of doing that?

The cleanest way I've come up with now,

onSet($atom, ({ newValue }) => {
    if (newValue === $atom.get()) {
      //@ts-expect-error - notify is not exposed in the types
      $atom.notify(newValue);
    }
  });

Would it make sense to expose the notify method in the types, like what's done with value?
Any obvious way to already do it that I'm missing?
Any other feature that could / should be implemented?

[ai]

There is a problem with notify, it doesn’t work with React.

React and some other frameworks requires change in the value.

The hacky way is to keep value inside the object and change the object:

$atom.set({ value })

[gismya]

Are there any obvious objections or issues with adding the notify to the types? If not I could work on a PR for that. It would be useful for this, but also for things like making custom lifecycle handlers and similar.

[ai]

We removed it because of React issues. We can add it with notice, but is it a good idea?

[blikblum]

I have use case for notify. I use web components

[ai]

OK, send PR with a notice.

[gismya]

@blikblum - it's now merged to the next branch