As a developer who regularly works with PHP Laravel and Python Flask, I encountered several challenges while upgrading to Tailwind CSS V4.

After resolving these issues step by step, I've written this blog post "Complete Guide to Installing Tailwind CSSv4 in Frameworks" to supplement the official documentation and help others who might face similar installation and configuration challenges.

Integrating Tailwind CSS 4 into backend frameworks primarily involves correctly configuring three key files: input.css, package.json, and the new vite.config.ts. The main focus is ensuring these files properly reference your project's directory structure.The most crucial modifications include:

- Setting the `type` field to `module` in `package.json` - Correctly defining the `outDir`, `input`, and `output` paths in `vite.config.ts`

These adjustments ensure proper file resolution and build processes in your framework.