The js file referenced by vue packaging is missing

When using the vue packaging tool, sometimes we encounter the problem of the referenced js file being lost. This problem will cause the entire application to fail to run properly, causing a lot of trouble and trouble to developers. This article will provide an in-depth analysis of this issue and provide some effective solutions to help developers quickly resolve this issue.

1. Cause of the problem

In the vue packaging tool, the external js files we introduce using import or require are usually automatically packaged into the application's vendor.js file. When we deploy the application to the server in production environment, we only need to include the vendor.js file in the HTML file. But sometimes we will find that a certain js file used in the application is not packaged into the vendor.js file, which will cause the application to not run properly. This situation usually occurs for the following reasons:

1. Path error: When we reference the js file, the path is written incorrectly, or the path of the js file is not specified in the webpack packaging configuration. Correctly configured, this will cause webpack to be unable to correctly package the js file into the vendor.js file.
2. Packaging optimization: webpack has some optimization measures when packaging, such as merging multiple files into one file or compressing files, etc. Sometimes, webpack will think that a js file has been included in other files and will not package it.
3. Module dependency: A certain js file we reference in the application may refer to other js files, but these files are not included or packaged correctly in the webpack packaging configuration. This will cause the imported js files to be lost.

2. Solution

Next, we will introduce some effective methods to solve the problem of missing js files referenced by vue packaging.

1. Check the path

When we encounter the problem of missing js file references, the first step should be to check whether the path of the js file is correct. We need to make sure that the path is correct and that the path to the file is included in the webpack configuration.

2. Clear cache

When webpack packages, it will cache some files to improve packaging speed. However, in some cases, these cache files will cause webpack to not correctly identify whether a certain js file needs to be packaged. At this time, we need to clear webpack’s cache files.

Enter the following command on the command line to clear webpack's cache files and repackage:

npm run clean
npm run build

3. Check the packaging optimization configuration

In webpack's packaging In the configuration, we can set some optimization measures, such as merging multiple files into one file or compressing files. However, in some cases, these optimizations can cause js files to be lost. Therefore, we need to carefully check the webpack packaging configuration to ensure that optimization measures have been configured correctly.

4. Adjust module dependencies

When a js file depends on other js files, we need to ensure that they are all included or packaged into the application correctly. If a dependent file is not packaged correctly, we need to modify webpack's packaging configuration to ensure that the file is packaged correctly.

5. Use CDN

When we find that a js file is missing, we can consider using CDN to load the file. A CDN ensures that files are stored on multiple servers and can be served at any time. We can upload js files to CDN and reference them in HTML files.

3. Summary

In this article, we conducted an in-depth analysis of the problem of missing js files referenced by vue packaging and provided some effective solutions. As developers, when encountering such problems, we should first eliminate path errors, secondly check packaging optimization configuration and module dependencies, and use CDN to load missing files. Through these solutions, we can quickly solve the problem of missing js files referenced by vue packaging and improve the reliability and stability of the application.

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