Detects via javascript is client is mobile/tablet regardless of size. Will always return false on desktop browser. Very Useful!

Javascript_detect_tablet_or_mobile_device.js

const isTabletOrMobileDevice = () => {
    // return window.screenX === 0 || window.screenLeft === 0; //OLD
    return /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(window.navigator.userAgent);
}