I'm creating a simple code editor for brainf language as a website as a practice for my coding skills. In that I kept a button for a function which automatically arrange l the code in lines. (Seperate the code part and the ignoring part in lines).

I want to keep a shortcut for the button as ctrl+I. But till now whatever key listening I did was for a single key. But here I have to listen for 2 keys at a time. In totally confused on how to do that. Please help me with a piece of code if possible to achieve this task USING PURE JAVASCRIPT.

Thanks in advance