js判断用户访问设备为mobile还是pc的方法和思考

前言

最近做完公司官网，因为不是做的响应式，而是分别PC和mobile各写了一套，所以有这样一个需求：

识别用户访问设备，如果用户通过电脑访问，则跳转至PC官网；反之通过手机访问，则跳转至mobile官网。

那应该怎么实现呢？

解决方法

查了很多方法，最终选择了下面这种

<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";
            document.writeln("您的浏览设备为：");
            if (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM) {
                document.writeln("phone");
            } else {
                document.writeln("pc");
            }
        }

        browserRedirect();
</script>

我自己稍微优化了一下代码

 //检测移动端还是PC端登录，分别跳转到对应移动和PC官网
            (function() {
                var sUserAgent = navigator.userAgent.toLowerCase(),
                    bIsIpad = sUserAgent.match(/ipad/i) == "ipad",
                    bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os",
                    bIsMidp = sUserAgent.match(/midp/i) == "midp",
                    bIsUc7 = sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4",
                    bIsUc = sUserAgent.match(/ucweb/i) == "ucweb",
                    bIsAndroid = sUserAgent.match(/android/i) == "android",
                    bIsCE = sUserAgent.match(/windows ce/i) == "windows ce",
                    bIsWM = sUserAgent.match(/windows mobile/i) == "windows mobile";
                if (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM) {
                    window.location.href = './mobile/index.html';

                } else {
                    window.location.href = './PC/index.html';
                }
            })()