JSFiddle - React, Tailwind, and code Playground

by LuckyCat

JavaScript

// work
var isMobile = false;
if (/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)) {
  alert("Mobile Detected");
  isMobile = true;
}
if (isMobile) {
  alert("Yes, it's Mobile");
} else {
  alert("No, it's Web");
}

// not work
function isMobile() {
  if (/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)) {
    alert("Mobile Detected");
    return true;
  }
  return false;
}

if (isMobile) {
  alert("Yes, it's Mobile");
} else {
  alert("No, it's Web");
}