JS-判断是否是微信中的浏览器

               $(function () {
			//判断是否是微信中的浏览器
			var ua = navigator.userAgent.toLowerCase();
			console.log(ua)
			if (ua.match(/MicroMessenger/i) != "micromessenger") {
				closeWindow();
			}
		})

                function closeWindow() {
   			var userAgent = navigator.userAgent;
		if (userAgent.indexOf("Firefox") != -1 || userAgent.indexOf("Chrome")                         != -1) {
				location.href = "about:blank";
			} else {
				window.opener = null;
				window.open('', '_self');
			}
			window.close();
		}

function onBridgeReady() {
			WeixinJSBridge.call('hideOptionMenu');
		}

		if (typeof WeixinJSBridge == "undefined") {
			if (document.addEventListener) {
				document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
			} else if (document.attachEvent) {
				document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
				document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
			}
		} else {
			onBridgeReady();
		}



marginBottom() {
				return uni.upx2px(this.itemStyle.marginBottom*2) + 'px';
			},