follow the example of Vue.js practical engineering article this video to create a webpack project step by step. The code is submitted here: https://github.com/zhangchunl.. Css can be displayed normally in the video tutorial. But I can"t display the css effect in vue single file component properly here. There are several blank lines in, npm run build in vue single file component

also want to debug, but looking at the relevant code is really confused, can not find the key place, so come here to ask