Webpack CSS chunks are extracted but not loaded - extract-css-chunks-webpack-plugin

问题

I'm currently working on code-splitting on CSS files on my React project. This project is built with webpack 3, and with the help of extract-css-chunks-webpack-plugin, CSS chunks are generated nicely.

However, I found that some chunks are not loaded or imported by any JS files.

I've made a simplified project from my real project to demonstrate this issue. (here)
In this example, when the dev-server.js is running, both app-[hash].js and app-[contentdash].css are loaded, while 0-[hash].js is loaded without 0-[contentdash].css

Question is

how to get the css chunks loaded by the corresponding js chunks?

来源：https://stackoverflow.com/questions/65067949/webpack-css-chunks-are-extracted-but-not-loaded-extract-css-chunks-webpack-plu