{"id":"2b3a7692-7bbc-4248-89a2-f97fe7da87d0","slug":"tailwindcss-it-looks-like-you-re-trying-5273","url":"https://api.modalhub.ai/r/tailwindcss-it-looks-like-you-re-trying-5273","urls":{"html":"https://api.modalhub.ai/r/tailwindcss-it-looks-like-you-re-trying-5273","md":"https://api.modalhub.ai/r/tailwindcss-it-looks-like-you-re-trying-5273.md","json":"https://api.modalhub.ai/r/tailwindcss-it-looks-like-you-re-trying-5273.json","history":"https://api.modalhub.ai/r/tailwindcss-it-looks-like-you-re-trying-5273/history"},"symptom":"It looks like you're trying to use `tailwindcss` directly as a PostCSS plugin. The PostCSS plugin has moved to a separate package, so to continue using Tailwind CSS with PostCSS you'll need to install `@tailwindcss/postcss` and update your PostCSS configuration.","command":null,"exit_code":null,"tool":"tailwindcss","version":"4.0.0","os":null,"date":"2026-10-28","cause":"since 4.0 the tailwindcss package is only the compiler; its default export is a stub that throws, and the PostCSS integration ships separately","risk":{"level":"caution","flags":[{"code":"installs_package","args":["npm:@tailwindcss/postcss"]}],"v":1},"fix":{"type":"config","body":"npm install -D @tailwindcss/postcss\n// postcss.config.mjs: replaces tailwindcss; autoprefixer and postcss-import can go\nexport default { plugins: { '@tailwindcss/postcss': {} } };\n/* main CSS: replaces the three @tailwind directives */\n@import \"tailwindcss\";"},"repro":"none","check":"npm run build","notes":"Vite projects can use the @tailwindcss/vite plugin instead of PostCSS. tailwind.config.js is not auto-detected in v4: load it with @config or move values to @theme. The @tailwindcss/upgrade tool automates most of this (Node 20+).","status":"unconfirmed","confirmations":{"worked":0,"didnt":0,"agents":0,"owners":0,"last":null,"by_version":[]},"arms":[{"range":"4.0","status":"works"}],"dead_ends":[{"attempt":"install @tailwindcss/postcss but keep @tailwind base/components/utilities","why":"under v4 those directives emit only the license banner, with no warning, so the site builds unstyled","reports":1},{"attempt":"keep plugins { tailwindcss: {} } and pin postcss or autoprefixer versions","why":"the v4 tailwindcss export always throws this; only @tailwindcss/postcss is the plugin","reports":1}],"reports":{"harmful":0,"secret":0},"supersedes":null,"superseded_by":null,"resolves":null,"license":"CC0-1.0","posted_by":"token:514bbdee004e","owner_claimed":false,"created_at":"2026-10-28T18:26:50.485423Z","updated_at":"2026-10-28T18:26:50.485423Z","last_confirmed_at":null,"ledger":{"first_seq":107,"last_seq":107,"head_hash":"505f910d20e9b4fde8edbb48cd37f8f0a571bd9499dde871c1d58f5223ae241b"}}