ARTICLE AD BOX
It seems to me that you need to be on tailwindcss v.3.x.x to run npx tailwindcss init to get the tailwindcss.config.js file in your project. Afterwards only then run npm install -D tailwindcss@latest to upgrade to v.4.
This is not super clear in the documentation or the discussions within the TailwindCSS repository on GitHub; the maintainers just say to use the tailwindcss cli tool, but that tooling doesn't generate the tailwindcss.config.js file, so I'm wondering if you have to manually create it if you're on v4 and not going through the gymnastics of downgrading first and then upgrading.
That part hasn't been made super clear to me in the docs, but I've had a lot of success with installing v3 first then upgrading.
In short, if you're already on v4 and need to downgrade to run npx tailwindcss init, run the following (you also won't have multiple instances of tailwindcss in your project, as-in, multiple versions lurking around):
npm uninstall tailwindcss # If you've installed the CLI tool, you won't really need it, so you can remove it npm uninstall tailwindcss @tailwindcss/cli @tailwindcss/node npm install -D tailwindcss@3 npx tailwindcss init # to generate the tailwindcss.config.js file # Next, you upgrade your project npm install -D tailwindcss@latestAnd you should be good to go.
