To get around this, we’ve always recommended people use the PostCSS Language Support plugin which gets rid of those warnings, but also removes all of the other CSS IntelliSense support.
You can read more about the new Tailwind CSS language mode for VS Code
Since that then, the Tailwind team has release Tailwind CSS Intellisense
Once you have the extension installed, if you want to try it out choose “Tailwind CSS” as the language mode for your CSS files.
Thanks Tailwind team and happy VS Coding!