How to use JS to determine whether the current page is a PC or mobile-opened

1. Using Regular Expressions and three-mesh operators , meaning that if the mobile side is open, then jump to "https:www.baidu.com/", if not just jump to "http://new.baidu.com/"

Window.location.href =/android|webos|iphone|ipod| Blackberry/i.test (navigator.useragent)? "https://www.baidu.com/":  "http://news.baidu.com/";

Equivalent to

if (/android|webos|iphone|ipod| Blackberry/i.test (navigator.useragent)) {    window.location.href = "https://www.baidu.com/";} else {    Window.location.href = "http://news.baidu.com/";}

2. The second method

function IsPC () {    var useragentinfo = navigator.useragent;    var Agents = ["Android", "IPhone",                "SymbianOS", "Windows Phone",                "IPad", "IPod");    var flag = true;     < Agents . length; v++) {        >  0) {            flag = false;            break;        }    }    return flag;}

3. The third method

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)) {        window.location.href=b page;    }} Browserredirect ();

4. Baidu's method of judging

function Uaredirect (f) {try {if (document.getElementById ("bdmark") = null) {return} var b = false;   if (Arguments[1]) {var e = window.location.host;   var a = window.location.href;    if (Issubdomain (arguments[1], e) = = 1) {f = f + "/#m/" + A;     B = true} else {if (Issubdomain (arguments[1], e) = = 2) {f = f + "/#m/" + A;     B = true} else {f = A;   b = False}}} else {b = true} if (b) {var c = Window.location.hash; if (!c.match ("Fromapp")) {if (Navigator.userAgent.match (/(iphone|ipod| android|ios| SymbianOS)) {Location.replace (f)}}}} catch (d) {}}function Issubdomain (c, d) {this.getdomain = function  (f) {var E = F.indexof ("://");  if (E > 0) {var h = f.substr (E + 3)} else {var h = f} var g =/^www\./; if (G.test (h)) {h = h.substr (4)} return H};  if (c = = d) {return 1} else {var c = This.getdomain (c);  var B = This.getdomain (d); if (c = = b) {return 1} else {c = c.replace (".", "\\.");   var a = new RegExp ("\ \" + C + "$"); if (B.match (a)) {return 2} else {return 0}}};

The above is Baidu summary, convenient oneself just!

How to use JS to determine whether the current page is a PC or mobile-opened