H5小游戏判断是否是微信浏览器

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判断是否为微信登录，选cavens

isWeiXin();
//判断是否微信登陆
function isWeiXin() {
var ua = window.navigator.userAgent.toLowerCase();
console.log(ua);//mozilla/5.0 (iphone; cpu iphone os 9_1 like mac os x) applewebkit/601.1.46 (khtml, like gecko)version/9.0 mobile/13b143 safari/601.1
if (ua.match(/MicroMessenger/i) == 'micromessenger') {
return true;
} else {
return false;
}
}
if(isWeiXin()){
console.log(" 是来自微信内置浏览器");
var  x=  document.getElementById("GameCanvas");
//x.style.transform = 'rotate(45deg)';
}else{
console.log("不是来自微信内置浏览器");
}