JSFiddle - React, Tailwind, and code Playground

JavaScript

document.onkeydown = keyDownEvent;
document.onkeyup = keyUpEvent;

var isCtrl = false;

function keyDownEvent() {
    var keyid = event.keyCode;
    
    if(keyid == 17) {
        isCtrl = true;
    }
}

function keyUpEvent() {
    var keyid = event.keyCode;
    
    if(keyid == 17) {
        isCtrl = false;
    }

    if(keyid == 89 && isCtrl == true) {
        alert('CTRL-y pressed');   
    }
}