JS判断当前访问设备是手机/平板/电脑？

一、程序代码 

<script>
    var os = function () {
      var ua = navigator.userAgent,
        isWindowsPhone = /(?:Windows Phone)/.test(ua),
        isSymbian = /(?:SymbianOS)/.test(ua) || isWindowsPhone,
        isAndroid = /(?:Android)/.test(ua),
        isFireFox = /(?:Firefox)/.test(ua),
        isChrome = /(?:Chrome|CriOS)/.test(ua),
        isTablet = /(?:iPad|PlayBook)/.test(ua) || (isAndroid && !/(?:Mobile)/.test(ua)) || (isFireFox &&
          /(?:Tablet)/.test(ua)),
        isPhone = /(?:iPhone)/.test(ua) && !isTablet,
        isPc = !isPhone && !isAndroid && !isSymbian;
      return {
        isTablet: isTablet,
        isPhone: isPhone,
        isAndroid: isAndroid,
        isPc: isPc
      };
    }();
    console.log('os', os)
    if (os.isAndroid || os.isPhone) {
      // 手机
      window.location.href = "https://m.xxxx.com";

    } else if (os.isTablet) {
      // 平板
    } else if (os.isPc) {
      // 电脑
    }
  </script>

二、运行结果

JS判断当前访问设备是手机/平板/电脑？_js