Instance methods that restrict Web pages to be opened only in WeChat built-in browsers

About the two scope of the page authorization of the difference, this article is mainly to share with you to restrict the page can only be opened in the built-in browser instance method, hope to help everyone.

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<script type= "Text/javascript" >     //The useragent of the browser is matched in regular, without the unique identity of the other browser     var useragent = navigator.useragent;     if (Useragent.match (/micromessenger/i) = ' Micromessenger ') {         //Here warning box will block the current page continue loading         alert (' This visit has been banned: You must use the built-in browser to access this page! ');         The following code is forcibly closing the current page with JavaScript         var opened = window.open (' About:blank ', ' _self ');         Opened.opener = null;         Opened.close ();     } </script>

The front end is best not to use UA to determine whether it is a built-in browser, because it is too easy to forge. This determines if (typeof Weixinjsbridge!== "undefined") {  return true;  }