What's wrong with jquery uploading a picture but not displaying it?

jQuery is a very popular JavaScript library that can easily implement dynamic web pages and interactive effects. During the development process, we often encounter some problems. How to display an image on the page after uploading it using jQuery is one of them.

This problem may have multiple causes, including HTTP request errors, file type mismatch, etc. In this article, we will provide some solutions to this problem to help you solve this problem.

1. Check the file path

The first thing to check is whether the file path is correct. If the file path is incorrect, the image will not load. Make sure the file path is correct, which can be viewed through the console or browser development tools.

2. Check the file type

When uploading images, it is likely that the file types do not match. In this case, you need to make sure that the file type you upload is correct. Files can be uploaded using jQuery's Ajax methods and require validation and processing on the server side.

3. Check the file relative path

If you are using a relative path, make sure the path points correctly. Relative paths can cause problems, mainly because the image path is relative to the page and not the JavaScript file. You can try using the full URL path, if you can display the image, you may need to change the relative path.

4. Check the image size

The size of the image may also be one of the reasons why the image is not displayed. Make sure the image size does not exceed the size limit specified on the server side. This may require code changes on the server side to recognize and handle larger images.

To sum up, finding and fixing the cause may be more complicated than we think. However, with a few steps such as carefully reviewing the error message, checking the file path and type, you may still be able to find a solution.

If the methods listed above don't resolve the issue, you may need to investigate more deeply. In this case, consider contacting other developers or support staff, or searching other relevant discussion forums and blogs.

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