JS判断PC端与移动端跳转的正确实现与常见错误分析

(function() {
      if (/Android|webOS|iPhone|iPad|Windows Phone|iPod|BlackBerry|SymbianOS|Nokia|Mobile|Opera Mini/i.test(navigator.userAgent)) {
        var siteName = window.location.pathname;
        if (url.indexOf("?pc") < 0) {
          try {
				if (typeof siteName !== "undefined") {
            	window.location.href = "https://m.jb51.net" + siteName
          		} 
          } catch (e) {}
        }
      }
    })();

;(function() {
  var reWriteUrl = function(url) {
    if (url) {
      var Splits = url.split("/"),
      siteName = window.location.pathname;
      if (typeof siteName !== "undefined") {
        return "https://www.jb51.net" + siteName
      }
    }
  };
  if (!/Android|webOS|iPhone|iPad|Windows Phone|iPod|BlackBerry|SymbianOS|Nokia|Mobile|Opera Mini/i.test(navigator.userAgent)) {
    var url = window.location.href;
    var pathname = window.location.pathname;
    if (url.indexOf("?m") < 0) {
      try {
        window.location.href = reWriteUrl(url)
      } catch(e) {}
    }
  }
})();

mobile: !! u.match(/AppleWebKit.*Mobile.*/) || !! u.match(/AppleWebKit/) && u.indexOf('QIHU') && u.indexOf('QIHU') > -1 && u.indexOf('Chrome') < 0, //是否为移动终端

var browser = {
 versions: function() {
 var u = navigator.userAgent;
 return {
  trident: u.indexOf('Trident') > -1,
  presto: u.indexOf('Presto') > -1,
  webKit: u.indexOf('AppleWebKit') > -1,
  gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1,
  mobile: !! u.match(/AppleWebKit.*Mobile.*/) || !! u.match(/AppleWebKit/) && u.indexOf('QIHU') && u.indexOf('QIHU') > -1 && u.indexOf('Chrome') < 0,
  ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/),
  android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1,
  iPhone: u.indexOf('iPhone') > -1 || u.indexOf('Mac') > -1,
  iPad: u.indexOf('iPad') > -1,
  webApp: u.indexOf('Safari') == -1
 }
 } (),
 language:(navigator.browserLanguage || navigator.language).toLowerCase()
};
document.writeln("语言版本: "+browser.language+"</br>");
document.writeln(" 是否为移动终端: "+browser.versions.mobile+"</br>");
document.writeln(" ios终端: "+browser.versions.ios+"</br>");
document.writeln(" android终端: "+browser.versions.android+"</br>");
document.writeln(" 是否为iPhone: "+browser.versions.iPhone+"</br>");
document.writeln(" 是否iPad: "+browser.versions.iPad+"</br>");
document.writeln(navigator.userAgent+"</br>");

/*
*
* 判断PC端与WAP端
*/
var mobile_bs = {
 versions: function() {
 var u = navigator.userAgent;
 return {
  trident: u.indexOf('Trident') > -1, //IE内核
  presto: u.indexOf('Presto') > -1, //opera内核
  webKit: u.indexOf('AppleWebKit') > -1, //苹果、谷歌内核
  gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1, //火狐内核
  mobile: !! u.match(/AppleWebKit.*Mobile.*/) || !! u.match(/AppleWebKit/) && u.indexOf('QIHU') && u.indexOf('QIHU') > -1 && u.indexOf('Chrome') < 0, //是否为移动终端
  ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端
  android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, //android终端或者uc浏览器
  iPhone: u.indexOf('iPhone') > -1 || u.indexOf('Mac') > -1, //是否为iPhone或者QQHD浏览器
  iPad: u.indexOf('iPad') > -1, //是否iPad
  webApp: u.indexOf('Safari') == -1 //是否web应该程序，没有头部与底部
 }
 } ()
};
if (mobile_bs.versions.mobile) {
 if (mobile_bs.versions.android || mobile_bs.versions.iPhone || mobile_bs.versions.iPad || mobile_bs.versions.ios) {
 window.location.href = "移动端网址";
 }
};