Added docs for tailwind setup in solid start

Author: max-programming

docs/start/config.json

@@ -150,6 +150,10 @@
               "label": "Static Prerendering",
               "to": "framework/solid/static-prerendering"
             },
+            {
+              "label": "Tailwind CSS Integration",
+              "to": "framework/solid/tailwind-integration"
+            },
             {
               "label": "Path Aliases",
               "to": "framework/solid/path-aliases"

docs/start/framework/solid/tailwind-integration.md

@@ -0,0 +1,146 @@
+---
+id: tailwind-integration 
+title: Tailwind CSS Integration 
+---
+
+_So you want to use Tailwind CSS in your TanStack Start project?_
+
+This guide will help you use Tailwind CSS in your TanStack Start project.
+
+## Tailwind CSS Version 4 (Latest)
+
+The latest version of Tailwind CSS is 4. And it has some configuration changes that majorly differ from Tailwind CSS Version 3. It's **easier and recommended** to set up Tailwind CSS Version 4 in a TanStack Start project, as TanStack Start uses Vite as its build tool.
+
+### Install Tailwind CSS
+
+Install Tailwind CSS and it's Vite plugin.
+
+```shell
+npm install tailwindcss @tailwindcss/vite
+```
+
+### Configure The Vite Plugin
+
+Add the `@tailwindcss/vite` plugin to your Vite configuration.
+
+```ts
+// vite.config.ts
+import { defineConfig } from 'vite'
+import tsConfigPaths from 'vite-tsconfig-paths'
+import { tanstackStart } from '@tanstack/solid-start/plugin/vite'
+import tailwindcss from '@tailwindcss/vite'
+
+export default defineConfig({
+  server: {
+    port: 3000,
+  },
+  plugins: [tsConfigPaths(), tanstackStart(), tailwindcss()],
+})
+```
+
+### Import Tailwind in your CSS file 
+
+You need to create a CSS file to configure Tailwind CSS instead of the configuration file in version 4. You can do this by creating a `src/styles/app.css` file or name it whatever you want.
+
+```css
+/* src/styles/app.css */
+@import "tailwindcss";
+```
+
+## Import the CSS file in your `__root.tsx` file
+
+Import the CSS file in your `__root.tsx` file with the `?url` query and make sure to add the **triple slash** directive to the top of the file.
+
+```tsx
+// src/routes/__root.tsx
+/// <reference types="vite/client" />
+// other imports...
+
+import appCss from '../styles/app.css?url'
+
+export const Route = createRootRoute({
+  head: () => ({
+    meta: [
+      // your meta tags and site config
+    ],
+    links: [
+      { rel: 'stylesheet', href: appCss },
+    ]
+    // other head config
+  }),
+  component: RootComponent,
+})
+```
+
+## Use Tailwind CSS anywhere in your project
+
+You can now use Tailwind CSS anywhere in your project.
+
+```tsx
+// src/routes/index.tsx
+import { createFileRoute } from '@tanstack/solid-router'
+
+export const Route = createFileRoute('/')({
+  component: Home,
+})
+
+function Home() {
+  return (
+    <div className="bg-red-500 text-white p-4">
+      Hello World
+    </div>
+  )
+}
+```
+
+That's it! You can now use Tailwind CSS anywhere in your project 🎉.
+
+## Tailwind CSS Version 3 (Legacy)
+
+If you are want to use Tailwind CSS Version 3, you can use the following steps.
+
+### Install Tailwind CSS
+
+Install Tailwind CSS and it's peer dependencies.
+
+```shell
+npm install -D tailwindcss@3 postcss autoprefixer
+```
+
+Then generate the Tailwind and PostCSS configuration files.
+
+```shell
+npx tailwindcss init -p
+```
+
+### Configure your template paths
+
+Add the paths to all of your template files in the `tailwind.config.js` file.
+
+```js
+// tailwind.config.js
+/** @type {import('tailwindcss').Config} */
+export default {
+  content: [
+    "./src/**/*.{js,ts,jsx,tsx}",
+  ],
+  theme: {
+    extend: {},
+  },
+  plugins: [],
+}
+```
+
+### Add the Tailwind directives to your CSS file
+
+Add the `@tailwind` directives for each of Tailwind's layers to your `src/styles/app.css` file.
+
+```css
+/* src/styles/app.css */
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+```
+
+> [!NOTE]
+> Jump to [Import the CSS file in your `__root.tsx` file](#import-the-css-file-in-your-__roottsx-file) to see how to import the CSS file in your `__root.tsx` file.