ExtJS 4.2 - “同步XMLHttpRequest”的可能原因警告？ [英] ExtJS 4.2 - Possible causes of a "Sychronous XMLHttpRequest" warning?

问题描述

好的一天，对于看似广泛的问题标题感到遗憾。

我正在使用php和sql为用户数据构建一个ExtJS4应用程序。一切都进行到一天，我注意到这个错误在我的java控制台：

 主线程上的同步XMLHttpRequest被弃用，因为对最终用户的经验有不利影响。 
有关更多帮助，请访问http://xhr.spec.whatwg.org/。 
  

最初，我没有这么麻烦，因为我的应用程序加载相当不错，而在我的本地网络。但是，一旦我上传到在线服务器并对其进行了测试，应用程序加载速度非常慢，有时甚至无法加载。

我不记得在我的应用程序中的任何地方调用XMLHttpRequest，所以我突然发现了如何或为什么我突然得到这个警告。 p>

我连接到我的数据库并返回的唯一方法是通过商店。

另外，作为一个侧面问题有没有办法使ExtJS4应用程序加载更快？我已经最小化了我使用的图像/图标的大小，我认为问题在于商店，但我的商店都没有设置为自动加载。

任何帮助是非常感谢谢谢。

解决方案

之前我有这个错误。这是由 Ext.Loader 引起的，它加载动态分类。

我可以通过在我的应用程序的主要js文件中的Ext.require（[...]）语句中添加必需的类来解决它（即app.js ）

docs解释何时和为什么异步和同步加载发生。

Good day, sorry for the seemingly broad question title.

I am building an ExtJS4 application using php and sql for the user data. Everything was going fine until one day, I notice this error in my java console:

Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. 
For more help, check http://xhr.spec.whatwg.org/.

Initially, I wasn't that troubled since my application was loading fairly well while testing it in my local network. However, once I uploaded to an online server and tested it, the application loaded really slowly and sometimes it wouldn't load at all.

I don't recall calling an XMLHttpRequest anywhere in my application, so I'm dumbfounded on how or why I'm getting this warning all of a sudden.

The only way I connect to my database and back is via Stores.

Also, as a side question, is there a way to make ExtJS4 applications load faster? I've minimized the size of the images/icons I use and I think the issue lies with the stores but none of my stores are set on autoload.

Any help is very much appreciated. Thank you.

解决方案

I had this error a while a ago. It is caused by Ext.Loader which loads the Ext classes dynamically.

I could solve it by adding the required classes in the Ext.require([...]) statement in the main js file of my application (i.e. app.js).

The docs for Ext.Loader explain when and why asynchronous and synchronous loading happens.

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