What should I do if 'Uncaught (in promise) Error: Request failed with status code 404' occurs when using axios in a Vue application?

In Vue application development, using axios to obtain and interact with data is often an essential task. However, when using axios, we sometimes encounter errors such as "Uncaught (in promise) Error: Request failed with status code 404", which prevents us from getting the results we expect and also affects the performance of our application. .

The specific meaning of this error is that the requested URL address is wrong or does not exist. This error may occur in the following situations:

1. The requested URL address does not exist. It may be caused by an incorrect URL address or unresponsive resources on the server side.
2. The axios module is not introduced correctly in the Vue application.
3. The routing configuration in the Vue application is incorrect or the routing is not configured correctly.

The solution to this error will depend on the specific situation, but here is a brief overview of a few possible solutions.

1. Check the request address

Check whether the axios request address is correct. It may be that the URL address is written incorrectly or the requested resource does not exist. You can check whether the resource can be obtained normally by manually entering the URL address in the browser.

2. Check the introduction of axios

Check whether axios is correctly introduced in the Vue application. You can introduce axios in main.js and then use axios in the .vue file. The common method is to introduce axios through the import statement, for example:

import axios from 'axios'

3. Check routing configuration

If the Vue application uses Vue-router, then check whether the routing configuration is correct. If the routing configuration is incorrect, the requested URL address will be incorrect.

The above are several common solutions, but the actual situation may be more complicated. If the above solutions do not solve the problem, you can also consider the following methods:

1. Check the network status

Sometimes the problem may be caused by network problems. You can try to check the network connection status or change the network environment.

2. Try to use other libraries

If the problem cannot be solved, you can try to use other libraries instead of axios, such as jQuery's ajax method. Or use the native XMLHttpRequest object to request data.

In short, the first step when an error like "Uncaught (in promise) Error: Request failed with status code 404" occurs is to understand the specific meaning of the error, and then check for common error conditions. If the problem still cannot be solved, you need to investigate the cause of the error more deeply, which may include debugging, viewing error logs, etc.

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