Tailwind v4: 'tailwindcss directly as a PostCSS plugin' error, fixed
[postcss] It looks like you're trying to use `tailwindcss` directly as a PostCSS plugin. Every cause of this Tailwind v4 error, plus the silent one that hits next.
nextjs
6 PostsTailwind v4: "tailwindcss directly as a PostCSS plugin"
Your Tailwind v4 upgrade throws 'trying to use tailwindcss directly as a PostCSS plugin'? Here's every cause, the sneaky CI-only variant, and the real fix.
Tailwind v4: 'trying to use tailwindcss directly as a PostCSS plugin'
Your Tailwind v4 build dies with 'It looks like you're trying to use tailwindcss directly as a PostCSS plugin': here's every real cause and the actual fix.
Next.js params Is a Promise: Fix the Async Params Error
`params` is a Promise and must be unwrapped with await or React.use() before accessing its properties — the exact fix for Next.js 15 and 16 App Router.
Next.js params/searchParams: Fixing the Promise Error
Next.js turned params and searchParams into Promises. Here's the exact warning text, why v16 makes it crash instead of warn, and how to fix it for good.
Tailwind v4: 'tailwindcss directly as a PostCSS plugin' error, fixed
[postcss] It looks like you're trying to use `tailwindcss` directly as a PostCSS plugin. Every cause of this Tailwind v4 error, plus the silent one that hits next.