The statistical analysis of Webpack 2 compilation and packaging using visual charts is explained in detail for your more intuitive reference.

In the previously updated seventeen episodes of "Webpack 2 Video Tutorial", we have successively explained Webpack 2 from configuration to packaging, compression optimization to debugging status, etc. in detail. In this In this section, we use visual charts to gain a deeper understanding of the packaging and compilation process of Webpack 2. At the same time, visual charts are also a very intuitive solution for project overview and optimization guidance.

1. Webpack 2 compilation statistics generation

The parameters for Webpack 2 to generate statistics are mainly to configure the following two parameters.

• --profile statistics generation to execution time related information, optional parameters;

• --json allows Webpack to generate statistical information, output format for json.

The following is a screenshot of the configuration in the test project package.json.

After configuration, execute the command npm run stats on the command line to see the generated statistics file stats.json# in the project directory. ##.

2. Use the generated data to generate visual charts

2.1 Official visual analysis tool

The official provides a visualization tool, the address is http://webpack.github .io/analyse/, select the

stats.json file generated above to generate a visual chart generated for the project.

In this chart you can see the size of your project’s generated files, reference relationships, and related information about the modules in the project.

2.2 Webpack Visualizer

is also a web generation tool. You can choose to upload the generated

stats.json file to generate charts.

2.3 Duplicate package detection and charting

You can install the duplicate-package-checker-webpack-plugin plug-in to detect duplicate packages in the project. To facilitate reference optimization of the project.

Of course, you can directly use the previously generated data file to directly generate a more cool graphical statistical information.

https://alexkuz.github.io/webpack-chart/

2.4 Unused resource detection

Use can also detect those in the project The resource files are not used and are provided for reference in later optimization projects.

2.5 3D chart generation

There is also a tool that can generate 3D icons, but it seems that the information is too confusing, so it can be used as a toy.

https://alexkuz.github.io/stellar-webpack/

2.6 Some other tools

can install a component locally and generate The resource usage icon can be enlarged or reduced.

A visualization tool for generating package dependencies, which can be used to graphically view information such as circular dependencies between packages.

3. Summary

These visual tools can greatly improve the efficiency of finding optimization targets when optimizing projects later.

However, all performance issues and package dependency guidelines should always be implemented throughout the entire project development process, rather than expecting to optimize problems such as project dependency confusion at the end, so as not to get back to work.

Source code address in the course:

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