Distinguishing between "Enter" keypress for Japanese kanji suggestion and other "Enter" events

Question

My question is somewhat related to this question. However, I do not have the luxury to listen for the submit event so the answer to that question will not work for me.

My question: Is it possible in Javascript to detect when the Japanese/Chinese suggestion menu is open? Or is there another way to distinguish an Enter keypress that is to accept the Japanese/Chinese character suggestion from any other Enter keypress?

The reason the solution from the other question will not work for my situation is that I am currently overriding the textarea functionality with JavaScript so that an Enter keypress submits the form instead of making a newline.

Therefore I want to be able to distinguish between an Enter keypress that is to accept a character suggestion for Japanese or Chinese and for any other Enter keypress I want to submit the form.

Answer 1

I use the following check to determine whether any keyboard event is happening inside that window (IME)

event.isComposing || event.keyCode === 229

isComposing alone is not enough, as Safari has a bug

keyCode is deprecated

But it's better than nothing, hope it helps!

Answer 2

Using the keydown event instead of the keyup event (discovered in this answer) seems to work in the latest versions of Chrome, Firefox and Safari using the Mac IME. I haven't been able to test it in Explorer or using any other IMEs. If anyone can share results under other browsers or IMEs it would be great to know.