The Ajax request returns undefined in IE.

This problem occurs again. Previously, due to the fact that the contenttype header was not uniformly specified when the backend PHP inputs JSON, it caused some special pitfalls. Today, I stepped on the logic of the rebuild layer, although it was quickly solved, it was recorded as an ICP filing. The project was too busy in the early stage. It was a waste of time to load the view fragments on all the bullet layers of the page directly to the main view through PHP, so artdialog5.0.1 was repackaged and the Ajax request content was added, the content is actually returned in IE because no encoding is specified at the front and back of the HTML segment, but the success callback function gets undefined. The solution is to specify the contenttype header for both Ajax requests and backend response requests,

$.Ajax ({URL:'',Type: 'Get ',Cache:False,Contenttype: 'Text/html; charset = UTF-8 ;',//Unified front-end and back-end encoding to UTF-8 to prevent undefined returned by IESuccess:Function(Result ){}});

 

Header("Content-Type: text/html; charset = UTF-8 ;");