Delay a callback without setTimeout. Make sure to polyfill RAF.

delay.js

const delay = (callback, duration) => {
    let startTime = 0;
    let terminate = false;
    const raf = requestAnimationFrame;
    const loop = (timestamp) => {
        startTime = startTime || timestamp;
        if (timestamp > startTime + duration && !terminate && callback) 
            return callback(),terminate = true;
        raf(loop);
    }
    raf(loop);
}
/*
delay(function () {
    alert('Hello World');
}, 3000);
*/