Tailwind and components folder
Don't forget to put all folders with React classes into tailwind.config.js
Toni PetrinaI was curious to see that classes in my components had zero effect, especially with dark mode. After digging a bit, it was a misconfiguration issue.
Next.js usually has pages in the pages/ folder and components in the components/ folder. When filling tailwind.config.js don't forget to add both folders:
content: ["./components/**/*.tsx", "./pages/**/*.tsx"],
Usually all the code is found in src/ folder so this is easily forgotten.