判断移动还是PC 以及微信环境

//判断pc还是移动端
function IsPC() {
  var userAgentInfo = navigator.userAgent;
  var Agents = ["Android", "iPhone",
        "SymbianOS", "Windows Phone",
        "iPad", "iPod"];
  var flag = true;
  for (var v = 0; v &lt; Agents.length; v++) {
    if (userAgentInfo.indexOf(Agents[v]) > 0) {
      flag = false;
      break;
    }
  }
  return flag;
}
// 判断是否是微信
    function isFromWeiXin () {
        var ua = navigator.userAgent.toLowerCase();
        if (ua.match(/MicroMessenger/i) == "micromessenger") {
            return true;
        }
    }
 

// 检测是否移动端
if(/iphone|ios|android|mini|mobile|mobi|Nokia|Symbian|iPod|iPad|Windowss+Phone|MQQBrowser|wp7|wp8|UCBrowser7|UCWEB|360s+Aphones+Browser|blackberry/i.test(navigator.userAgent)) {
    location.href = '移动端地址';
}
// 检测是否移动端
if(/Android|webOS|iPhone|iPad|iPod|BlackBerry/i.test(navigator.userAgent)) {
    window.location.href = "移动端地址"+location.search;
}
//检测是否PC端
if(!/Android|webOS|iPhone|iPad|iPod|BlackBerry/i.test(navigator.userAgent)) {
    window.location.href = "PC端地址"+location.search;
}


// 判断 移动环境 PC环境 微信环境
  function  judgePcOrAppOrWx() {
        let environment;
        let flag=true;
        let userAgentInfo = navigator.userAgent;
        let userAgentInfoLower = navigator.userAgent.toLowerCase();

        let agents = ['Android', 'iPhone', 'SymbianOS', 'Windows Phone', 'iPad', 'iPod'];
        for (let i = 0; i <agents.length; i++) {
            if (userAgentInfo.indexOf(agents[i]) > -1) {
                flag =false;
                break;

            }
        }

        if (flag === true) {
            environment = 'PC';
        } else if (userAgentInfoLower.match(/MicroMessenger/i) != 'micromessenger') {
            environment = 'APP';
        } else {
            environment = 'WX';
        }
        return environment;
    },
 