ie8 jquery get is not supported

In current Web front-end development, jQuery has become a very important library. It provides many convenient functions that can greatly improve the efficiency of writing JavaScript. However, when developing with jQuery, we also encounter some strange problems. For example, in IE8, jQuery's get function is not supported.

IE8 is an older browser. Some new technologies and functions are not supported in this browser. Although many people have begun to use more advanced browsers, in some special scenarios, we still need to consider compatibility issues. Therefore, many websites and applications still need to support IE8.

One of the common problems is that in IE8, you will get an error when using jQuery's get function. The usual manifestation of this error is that when we use the get function to obtain a remote JSON data in IE8, we will get an unparsable error, and this error does not exist in other browsers.

So, why does this problem occur? What exactly causes jQuery's get function to not work properly in IE8?

First of all, we need to know that jQuery’s get function is actually an Ajax function. It is used to send asynchronous HTTP requests and get the returned data. In this process, jQuery uses the XMLHttpRequest object provided by the browser. However, in IE8, the implementation of this object is different from other browsers. This leads to some unforeseen problems.

After careful research, we found the root cause of the problem with jQuery get function in IE8. The XMLHttpRequest object in IE8 handles HTTP responses differently than other browsers. Specifically, when a request returns an error such as 404 Not Found or 500 Internal Server Error, IE8 will not treat the returned data as an error. In other browsers, such errors will be placed in the error callback function.

Since jQuery's get function is implemented based on this standard behavior, it will cause errors in IE8. When a request returns an error such as 404 Not Found or 500 Internal Server Error, jQuery considers the request to have been completed and therefore does not trigger the error callback function. This results in us being unable to obtain the error information returned by this request. Moreover, in IE8, due to the way the XMLHttpRequest object is implemented, we cannot manually obtain this error message.

So, how do we solve this problem? In fact, the solution to this problem is also very simple. We only need to manually check the returned data after the request is completed to determine whether there are errors.

Specifically, we can judge the returned data in the success callback function. If the returned data is an error page, then we consider that an error occurred in this request and output the error message to the console. In this way, we can get the details of this error.

In addition, we can also use jQuery's ajaxError function to capture all Ajax errors. This function will be triggered when an error occurs in any Ajax request. In IE8, since the error message cannot be obtained, we can manually create an error message in this function and output it to the console. In this way, we can find errors in the code more easily.

To sum up, although jQuery's get function will have some problems in IE8, this problem is not difficult to solve. Just manually check the returned data or use the ajaxError function to solve this problem. Of course, in actual development, we also need to pay more attention to browser compatibility issues. Only in this way can we write more robust and efficient applications.

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