I just created a new project and followed this page from NextJS documentation:

And here is the page I get after running 'npm run dev':

You can see that the page has none of the global styles and the body element's styles are also empty.

CodePudding user response：

I tried deleting the .next folder and restarting the server and it finally worked. I think the issue is that creating /pages/_app.js requires you to recreate the whole build and just restarting it without deleting .next entirely isn't enough.

CodePudding user response：

Sometimes browsers do cache style files. You can force browser to download new style file by refreshing page with Ctrl F5.