How to Set Up Prettier with Astro and Tailwind CSS 4 for Auto Formatting

Developers building Astro projects can configure Prettier 3 to automatically format both .astro files and Tailwind CSS utility classes using two dedicated plugins. Because Prettier 3 removed automatic plugin discovery, both prettier-plugin-astro and prettier-plugin-tailwindcss must be explicitly listed in the plugins array of the .prettierrc configuration file. For Tailwind CSS 4, the tailwindStylesheet option must point to the CSS entry file containing the @import 'tailwindcss' directive, which is typically created when running npx astro add tailwind. The setup requires a current Node.js LTS version, and VS Code users are advised to install the Astro and Prettier extensions for editor-level formatting support. Projects using Svelte alongside Astro can extend the same configuration by adding prettier-plugin-svelte to the plugins array in the correct order.