JSFiddle - React, Tailwind, and code Playground

HTML

<input placeholder="Try typing CTRL-A in Firefox" style="width: 200px"/>

JavaScript

$("input").keypress(function (e) {
    if (e.which !== 0 && e.charCode !== 0) {
        alert(String.fromCharCode(e.keyCode|e.charCode));
    }
});