Not support option keys, like ∆(option +J)

Option key on Mac is the same as Alt. The JS event is also fired with an Alt code. So if you use Key.Alt, you should be good.

Am I missing something ?

Oct 27 '20 08:10 ashubham

When I enter the Option key and then enter other keys, the key in the KeyboardEvent will have a different value, and I am operating under Mac system

Oct 27 '20 09:10 janryWang