JavaScript 判斷客戶端類型 實現響應式頁面
在跨平臺，各種瀏覽器，移動設備兼容的時候，經常要根據設備、瀏覽器做特定調整，所以判斷設備和瀏覽器的工作，我們經常會用到navigator.userAgent.toLowerCase()來進行判斷。
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no" />
<script type="text/javascript">
function browserRedirect() {
var sUserAgent = navigator.userAgent.toLowerCase();
var bIsIpad = sUserAgent.match(/ipad/i) == "ipad";
var bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os";
var bIsMidp = sUserAgent.match(/midp/i) == "midp";
var bIsUc7 = sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";
var bIsUc = sUserAgent.match(/ucweb/i) == "ucweb";
var bIsAndroid = sUserAgent.match(/android/i) == "android";
var bIsCE = sUserAgent.match(/windows ce/i) == "windows ce";
var bIsWM = sUserAgent.match(/windows mobile/i) == "windows mobile";
if (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM) {
//跳轉移動端頁面
window.location.href="https://dengxj.blog.csdn.net/";
} else {
//跳轉pc端頁面
window.location.href="https://dengxj.blog.csdn.net/";
//一般放在PC頁面前端 因此“跳轉pc端頁面”代碼應當刪除，不然就陷入了死循環。
}
}
browserRedirect();
</script>
</head>
<body>
</body>
</html>
其次就是將代碼運用到具體網頁中去：
<!DOCTYPE html>
<html lang="en" class="no-js">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no" />
<script type="text/javascript">
function browserRedirect() {
var sUserAgent = navigator.userAgent.toLowerCase();
var bIsIpad = sUserAgent.match(/ipad/i) == "ipad";
var bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os";
var bIsMidp = sUserAgent.match(/midp/i) == "midp";
var bIsUc7 = sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";
var bIsUc = sUserAgent.match(/ucweb/i) == "ucweb";
var bIsAndroid = sUserAgent.match(/android/i) == "android";
var bIsCE = sUserAgent.match(/windows ce/i) == "windows ce";
var bIsWM = sUserAgent.match(/windows mobile/i) == "windows mobile";
if (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM) {
//跳轉移動端頁面
window.location.href="login-phone.html";
} else {
//跳轉pc端頁面
}
}
browserRedirect();
</script>
<title>login</title>
</head>
<body>
網頁內容***網頁內容***網頁內容***網頁內容***網頁內容***網頁內容***網頁內容***網頁內容***網頁內容***網頁內容***
</body>
</html>