[LiveComponent] Check if accessed vars exist

[maciazek]

Q	A
Bug fix?	yes
New feature?	no
Issues	Fix #2487
License	MIT

In my case, checking 'placeholder' for existence is sufficient. But I can imagine some very extreme custom form type which - besides 'choices' - has 'placeholder' option too. In that case, when 'placeholder' is set to false, then 'multiple' option need to be checked for existence, and so on... Considering the most pessimistic scenario, I think at least 'placeholder', 'multiple' and 'expanded' options should be checked.

I'm not sure about the rest - if there could be a situation where 'required', 'disabled' or 'value' option is nonexistent?

[smnandre]

Hey @maciazek during my reading of all this I found another bug here...

As I wanted to make some changes in your PR... I ended by opening a new PR for both: #2491

If you want to have a look at it and confirm it does fix your problem?

Thank you very much for opening this one!

[maciazek]

Of course, I'll check it in my workplace tomorrow as I'm out of office today. Thanks!

[smnandre]

I'm closing this one but I'd like to thank you again for stepping up, explaining your case precisely and kindly, then opening a PR to fix the issue.

🙇‍♂️