How Can Use "getmodifierstate" On Focus Event With Js?

I'm trying to get caps lock status on focus event of input this is my code $('#Input')[0].addEventListener('focus', function (key) { if (key.originalEvent.

Solution 1:

There are different types of event object. getModifierState is only defined for KeyboardEvent (such as a keydown) and MouseEvent (such as a click); focus is neither.

You might look at using click and remembering whether you already had focus (e.g., so you don't repeat the action if the click is in an already-focussed element). Ugh, no, that's a terrible suggestion. There are lots of ways your element might get focus other than clicks.