Tailwind CSS: "npm error could not determine executable to run"
I've been using Tailwind CSS for my projects for a long time. Starting my new project, I installed the package and created the tailwind.config.js file via the command npx tailwindcss init -p, as I'm used to. But then I ran into an unexpected error – npm can't find the executable called by npx tailwindcss, even though I installed it. Reproducing the error message is as simple as running the following two commands from the root of the project : $ npm install -D tailwindcss $ npx tailwindcss init -p npm error could not determine executable to run npm error A complete log of this run can be found in: ... Why am I running into this error when it used to work before?
TL;DR (for init process): Since v4, there is no need for a tailwind.config.js file, so the init process is also unnecessary, making both outdated. Review the v4 installation guides, where the init step is not included. Or install v3 with specifically changed guide. TL;DR (for Tailwind CLI): Previous content + In v4, Tailwind CLI was separated from the core package, so an additional package needs to be installed see below and in How to use Tailwind CLI. TailwindCSS v4 TailwindCSS has just released its new v4 version, so all the older v3 documentation has become somewhat outdated. Upgrade guide - TailwindCSS v3 to v4 Changed npx tailwindcss to npx @tailwindcss/cli The command to run is now no longer npx tailwindcss but npx @tailwindcss/cli. PostCSS plugin and CLI are separate packages — the main tailwindcss package doesn't include these anymore since not everyone needs them, instead they should be installed separately using @tailwindcss/postcss and @tailwindcss/cli. Source: Open-sourcing our progress on Tailwind CSS v4.0 - Whats changed This is basically only necessary if you're not using it with a framework and want to run it from the command line. For this, a standalone @tailwindcss/cli package will help from v4 onwards. npm install tailwindcss @tailwindcss/cli Get started with Tailwind CSS - TailwindCSS v4 Docs TailwindCSS v4 Alpha: Using the CLI Deprecated init process In v4, the installation process has changed. It's now simpler. The init command has become obsolete and is no longer usable from v4 onwards because it's not needed anymore. tailwindlabs/tailwindcss #15791 - init process not available - GitHub Using the upgrade tool If you'd like to try upgrading a project from v3 to v4, you can use our upgrade tool to do the vast majority of the heavy lifting for you: npx @tailwindcss/upgrade@next How to using the upgrade tool - Tailwind CSS v4 Docs Unable to upgrade Tailwind CSS v3 to v4 - Related: an interesting fact about this Other related changes from v4 Removed @tailwind directives Deprecated: Sass, Less and Stylus preprocessors support @import "tailwindcss"; does not work when used in a file with an .scss extension Automatic Source Detection from TailwindCSS v4 Adding an external source or a package from within node_modules for detection [postcss] It looks like you're trying to use tailwindcss directly as a PostCSS plugin TailwindCSS v3 For a installation, you'll already be installing v4. However, if you want to install v3, use the old documentation with the following command: npm install tailwindcss@3 Get started - TailwindCSS v3 Docs Cannot build frontend using Vite, TailwindCSS with PostCSS - StackOverflow
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