How to cancel events like keypress, keyDown, ... from one key and activate them in another

Question

I have been playing a flash game in the browser for a long time, and recently I acquired a notebook with a very different keyboard and wondered if I could have a Javascript script that I could run on the console that would 'change' the keys. For example, when I press the keys WSAD it would be as if I had pressed the arrow keys.

Just to illustrate...

trocar(A, B) {

cancelarEventoDe(A);

ativarEventoDe(B);

}