This is uses tailwindcss new utility class dark:
to add dark mode .
https://tailwindcss.com/docs/dark-mode
npm install tailwindcss postcss autoprefixer postcss-cli
npm run build
https://marketplace.visualstudio.com/items?itemName=ritwickdey.LiveServer
./DarkMode/index.html
URL: https://vercel.com/graciasclaude/tailwindcss-darkmode-starter