js对于客户端的区分代码

//区分设备
function judge_decice()
{
    let ua =navigator.userAgent.toLowerCase();
    if(/android|adr/gi.test(ua)) {
        return ‘android‘;
    }else if( /\(i[^;]+;( U;)? CPU.+Mac OS X/gi.test(ua)) {
        return ‘iphone‘;
    }else if(/iPad/gi.test(ua)) {
        return ‘ipad‘;
    }else{
        return  ‘unknow device‘;
    }
}
//判断是不是pc
function IsPC() {
    var userAgentInfo = navigator.userAgent;
    var Agents = ["Android", "iPhone",
                "SymbianOS", "Windows Phone",
                "iPad", "iPod"];
    var flag = true;
    for (var v = 0; v < Agents.length; v++) {
        if (userAgentInfo.indexOf(Agents[v]) > 0) {
            flag = false;
             break;
         }
     }
     return flag;
 }

//区分客户端  新浪微博为1，QQ客户端为2，微信低于6.0.2版本为3，高于6.0.2版本为4，其他为0。
function judge_client()
{
    var ua = navigator.userAgent.toLowerCase();
    if(ua.match(/weibo/i) == "weibo"){
        console.log(1);
    }else if(ua.indexOf(‘qq/‘)!= -1){
        console.log(2);
    }else if(ua.match(/MicroMessenger/i)=="micromessenger"){
        var v_weixin = ua.split(‘micromessenger‘)[1];
        v_weixin = v_weixin.substring(1,6);
        v_weixin = v_weixin.split(‘ ‘)[0];
        if(v_weixin.split(‘.‘).length == 2){
            v_weixin = v_weixin + ‘.0‘;
        }
        if(v_weixin < ‘6.0.2‘){
            console.log(3);
        }else{
            console.log(4);
        }
    }else{
        console.log(0);
    }

}

//是否在微信打开
function isWeiXin(){
    var ua = navigator.userAgent.toLowerCase();
    if(ua.indexOf(‘micromessenger‘) != -1) {
        return true;
    } else {
        return false;
    }
}