switching focus fast sometimes doesn't trigger spell check

[danielnaber]

If you have a textarea with English text and one with German text and you switch between them very fast (just by clicking in inside), sometimes the language gets detected, but the spell checker doesn't update, e.g. the German text stays underlined.

[danielnaber]

Same when clicking in a textarea directly after page load.

[danielnaber]

Improved but not fixed by using setTimeout.

[ashrafsabrym]

How to reproduce this problem? Did it happen on a certain website?

[danielnaber]

I can reproduce with my test.html. Reload page, click in German text field -> German detected but still everything underlined. Doesn't happen every time though.

[ashrafsabrym]

I can't reproduce this problem. I even removed the setTimeout call, and still the problem doesn't happen.
This may be caused by a JavaScript problem that occurs before this part in changeDictionary that sets the dictionary language. If the problem occurs so often, then please run the addon in debug mode and do the steps that causes the problem. When it happen, look at the console and see if there's any thrown JavaScript errors.

[danielnaber]

I always (no matter if the problem occurs) get a deprecation warning that tells me to use defaultPrevented instead of getPreventDefault(). Not sure what that refers to. The source of the message is just test.html with no line number. I don't get any other errors or warnings.

[ashrafsabrym]

The deprecation warning is caused by jQuery. It's not caused by our code.
Seems that this problem will be hard to discover.

This may be weird, but why not this is caused by the dictionaries themselves or Firefox spell checking service?