JavaScript 检测移动浏览器

以下是用 JavaScript 检测移动浏览器的代码 −

示例

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
body {
font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
.sample {
   font-size: 18px;
   font-weight: 500;
}
</style>
</head>
<body>
<h1>Detecting a mobile browser</h1>
<div class="sample"></div>
<button class="Btn">CLICK HERE</button>
<h3>Click on the above button to see if it is a mobile device or not</h3>
<script>
let fillEle = document.querySelector(".sample");
let date = new Date();
let primitiveDef = date[Symbol.toPrimitive]("default");
let primitiveNum = date[Symbol.toPrimitive]("number");
document.querySelector(".Btn").addEventListener("click", () => {
   var checkMobile = /iPhone|iPad|iPod|Android/i.test(navigator.userAgent);
   if (checkMobile) {
      fillEle.innerHTML = "This is a mobile device";
   }
   else fillEle.innerHTML = "This is not a mobile device";
});
</script>
</body>
</html>