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Home Web Front-end HTML Tutorial The development environment picture is displayed normally, but the production environment cannot be displayed. What is the reason?

The development environment picture is displayed normally, but the production environment cannot be displayed. What is the reason?

Apr 05, 2025 am 08:15 AM
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The development environment picture is displayed normally, but the production environment cannot be displayed. What is the reason?

The development environment picture is displayed normally, but the production environment cannot be displayed. What is the reason?

The image path seems to be consistent, and the image displayed in the local development environment is normal, but it cannot be displayed after being deployed to the production environment? This is a common problem in web development. This article will analyze the possible reasons why img tag images are displayed in the development environment and the production environment are not displayed.

Problem description:

Use the img tag to refer to the image. The local development environment displays normally, but the production environment cannot display it. You can open the image by directly accessing the path pointed to by src attribute of the image directly through the browser, which eliminates the possibility of path errors.

Problem analysis and solutions:

Although the browser can directly access the image path, this does not mean that the production environment server can respond correctly to the request and return the image. The following aspects need to be checked:

  1. Cross-domain issues: Image resources may be hosted under different domain names, ports, or protocols. The server domain name or configuration of the production environment is different from that of the development environment, which causes the browser to be unable to access images due to the same-origin policy restrictions.

  2. Image 404 error or path problem: Even if the browser can access it directly, the server may not find the image in a production environment. This may be because:

    • The image storage path in the production environment is different from that in the development environment.
    • The deployment path changes result in a path error, resulting in a 404 error (file not found). For example, the image is deployed in a secondary directory, but the path has not been adjusted accordingly.
  3. Server Access Control: The production environment server may be configured with access whitelists, and only the IP address or domain name in the whitelist can access specific resources, including pictures. If the production environment server IP or domain name is not on the whitelist, the image cannot be accessed.

  4. Server-side configuration error: There may be some configuration problems on the server side, such as the image MIME type setting error, which causes the server to fail to correctly recognize and return the image.

Debugging method:

To effectively solve the problem, please use the browser developer tools (usually press F12 to open), and view the console and network panels. Check for 404 errors, cross-domain errors, or other related error information. This information will help you quickly locate the root cause of the problem. At the same time, check the server-side logs to look for possible error prompts.

By carefully examining the above aspects and combining browser developer tools and server log information, you can effectively solve the problem that images cannot be displayed in the production environment.

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