效果：判断网页是否是在微信浏览器打开；
$(function(){ //判断页面是否是在微信浏览器打开 //对浏览器的UserAgent进行正则匹配，不含有微信独有标识的则为其他浏览器 var useragent = navigator.userAgent; if (useragent.match(/MicroMessenger/i) != 'MicroMessenger') { window.location.href = "wxError.html";//若不是微信浏览器，跳转到温馨error页面 } })
微信提示页面（代码为微信原生代码）；
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" /> </head> <body> <script type="text/javascript"> var ua = navigator.userAgent.toLowerCase(); var isWeixin = ua.indexOf('micromessenger') != -1; var isAndroid = ua.indexOf('android') != -1; var isIos = (ua.indexOf('iphone') != -1) || (ua.indexOf('ipad') != -1); if (!isWeixin) { document.head.innerHTML = '<title>抱歉，出错了</title><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=0"><link rel="stylesheet" type="text/css" href="https://res.wx.qq.com/open/libs/weui/0.4.1/weui.css">'; document.body.innerHTML = '<div class="weui_msg"><div class="weui_icon_area"><i class="weui_icon_info weui_icon_msg"></i></div><div class="weui_text_area"><h4 class="weui_msg_title">请在微信客户端打开链接</h4></div></div>'; } </script> </body> </html>
function is_weixn(){
var ua = navigator.userAgent.toLowerCase();
if(ua.match(/MicroMessenger/i)=="micromessenger") {//这就是微信用的内置浏览器
return true;
} else {
return false;
}
}
<script> var ua = navigator.userAgent.toLowerCase(); var isWeixin = ua.indexOf('micromessenger') != -1; if (!isWeixin) { window.location.href = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=888" } </script>