js判断手机端和pc端以及微信浏览器

方法一：

if(/Android|webOS|iPhone|iPod|BlackBerry/i.test(navigator.userAgent)) {
    console.log('this is wap');
} else {
    console.log('this is pc');
}

方法二：

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){
   console.log('this is wap');
}else{
   console.log('this is pc');
}

------------------- 补充  判断微信浏览器 -------------------

//判断是否是微信浏览器的函数
function isWeiXin(){
  var ua = window.navigator.userAgent.toLowerCase();
  if(ua.match(/MicroMessenger/i) == 'micromessenger'){
    return true;
  }else{
    return false;
  }
}