<div class="mask_weixin"></div>
<script src="./js/jquery.js"></script>
<script>
	// 判断是否在微信打开
	function isWeixin() {
		var nu = navigator.userAgent.toLowerCase();
		if (nu.match(/MicroMessenger/i) == "micromessenger") {
			return true;
		} else {
			return false;
		}
	}
	let isWX = isWeixin();
	if(isWX){
		$('.mask_weixin').append("<div class='mask'><img src='./img/browser.png' /></div>");
	}
</script>
<style>
/* 遮罩 */
.mask{
	position:fixed;
	top:0;
	left:0;
	bottom:0;
	right:0;
	width:100%;
	height:100%;
	display:flex;
	justify-content:center;
	align-items:flex-start;
	z-index: 100;
	background:rgba(0,0,0,0.8);
}
.mask img{
	width:calc(100% - 40px);
	height:auto;
	margin-top:20px;
}
</style>