How to solve the problem of excessively large files and slow loading after Vue project packaging?

Deployment Problems and Solutions of Large Vue Projects

In Vue project development, it is common problem to have packaged files that are too large and slowly loaded. Recently, a developer encountered this problem. His supervisor even suggested skipping the packaging step and directly using npm run dev to go online, which aroused the developers' doubts.

The specific problem encountered by developers is: due to the huge project and poor Webpack configuration, the packaged files are huge (several megabytes), which leads to extremely slow loading for the first time. The supervisor recommends bypassing the packaging process and deploying it directly to the server using npm run dev in the development environment.

Problem analysis and solutions:

Improper Webpack configuration is the main reason for excessive packaging files. The default configuration usually packs all resources into a single file, which can seriously affect loading speed for large projects. The solution is to optimize the Webpack configuration, the main ways are as follows:

1. Code Splitting: Splitting the code into multiple smaller blocks, loading as needed, avoiding loading all code at once.
2. Lazy Loading: Loading components or modules only when needed, reducing the initial load burden.
3. Resource compression and optimization: Use UglifyJS, Terser and other tools to compress JS code, and optimize resources such as images to reduce file size.
4. Content distribution network (CDN): Deploy public libraries such as Vue and Vue Router to CDN to increase loading speed and reduce server pressure.

As for npm run dev direct launch plan proposed by the supervisor, this is absolutely undesirable. npm run dev is used in the development environment and provides functions such as thermal updates, and is not suitable for production environments. Directly using npm run dev to go online will bring the following serious consequences:

• Performance bottleneck: The development server is not optimized and cannot cope with high concurrent requests in the production environment.
• Security risks: The development environment usually lacks security protection measures, and directly exposed to the public network poses huge security risks.
• Poor stability: The development server may crash due to memory leaks or unhandled exceptions, affecting the user experience.

Best practice: Be sure to optimize the Webpack configuration, use npm run build to generate optimized production environment code, and then deploy it to the server. This ensures the performance, stability and security of the project in a production environment.

All in all, the deployment of large Vue projects needs to be handled with caution. Optimizing Webpack configuration is the key to solving the problem of excessive packaging files, and directly using npm run dev to go online is an extremely unprofessional approach and should be resolutely avoided.

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