前端小技巧

1、设备跳转

<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) {
          window.location.href = 'm/index.html';
        } else {
          // window.location.href = 'index.html';
        }
      }
      browserRedirect(); 
    </script>

2、JS/JQ获取META等任意标签值

<aaa bbb="ccc" ddd="eee" />
<aaa bbb="fff" ddd="xxx" />
//根据ccc获取eeee

//jq
$('aaa[bbb=ccc]').attr('ddd');

//js
document.getElementsByTagName('aaa')[0].ddd   //eee
document.getElementsByTagName('aaa')[1].ddd   //xxx