Why popup page has no style？

[Cjw-259]

Popup pages have no style , demo : https://github.com/Cjw-259/chrome-extension-demo ,Try npm run build, then add to chrome extension

[dylan880507]

Popup pages have no style , demo : https://github.com/Cjw-259/chrome-extension-demo ,Try npm run build, then add to chrome extension

I also ran into the same problem. I found that popup html did not get a reference to css which belongs to popup.
Just a thinking, you can append the css reference to body of popup html during the page generation.