About Tailwind CSS 4 support
While the development of eslint-plugin-tailwindcss for Tailwind CSS v4 is ongoing, you can use the latest version published on the beta channel to get partial support of Tailwind CSS v4.
npm i eslint-plugin-tailwindcss@beta -D
NB: As we will focus the effort on the full rewrite of the plugin, this version is available "as is" and you may get errors or false positives like for the rule
no-contradicting-classname. You can learn more about these issues on GitHub.
You can always disable specific rules if necessary.
This version has been made possible thanks to the work of hyoban and his project tailwind-api-utils.