# Vite

> Modern és gyors frontend build eszköz WordPress témákhoz és bővítményekhez.

A [Vite](https://vitejs.dev/) egy modern, rendkívül gyors frontend build eszköz, amely natív ES modulokat használ fejlesztés közben. WordPress témákhoz és bővítményekhez ideális választás a gyors HMR (Hot Module Replacement) és az optimalizált production build miatt.

## Miért Vite?

- **Villámgyors** - Native ES modules fejlesztéshez
- **HMR** - Azonnali módosítások böngészőben
- **Modern** - ES6+, TypeScript, JSX támogatás
- **Optimalizált build** - Rollup alapú production build
- **Plugin rendszer** - Bővíthető funkcionalitás
- **CSS kezelés** - PostCSS, Sass, Less támogatás

## Telepítés

### Új projekt

```bash
# npm
npm create vite@latest my-wordpress-theme

# yarn
yarn create vite my-wordpress-theme

# pnpm
pnpm create vite my-wordpress-theme
```

### Meglévő projektbe

```bash
cd my-wordpress-plugin
npm init -y
npm install -D vite
```

## WordPress téma integráció

### Projekt struktúra

```
my-theme/
├── src/
│   ├── js/
│   │   └── main.js
│   ├── css/
│   │   └── style.css
│   └── images/
├── dist/                 # Build output
├── vite.config.js
├── package.json
├── functions.php
└── style.css
```

### vite.config.js

```javascript
import { defineConfig } from 'vite';
import { resolve } from 'path';

export default defineConfig({
  build: {
    // Output könyvtár
    outDir: 'dist',

    // Manifest fájl generálása (PHP integrációhoz)
    manifest: true,

    // Rollup beállítások
    rollupOptions: {
      input: {
        main: resolve(__dirname, 'src/js/main.js'),
        admin: resolve(__dirname, 'src/js/admin.js'),
      },
      output: {
        entryFileNames: 'js/[name].[hash].js',
        chunkFileNames: 'js/[name].[hash].js',
        assetFileNames: (assetInfo) => {
          if (assetInfo.name.endsWith('.css')) {
            return 'css/[name].[hash][extname]';
          }
          return 'assets/[name].[hash][extname]';
        },
      },
    },
  },

  // Development server
  server: {
    // CORS engedélyezése WordPress-hez
    cors: true,
    // Port
    port: 5173,
    // Strict port (ne váltson másikra)
    strictPort: true,
    // HMR beállítások
    hmr: {
      host: 'localhost',
    },
  },
});
```

### package.json scripts

```json
{
  "scripts": {
    "dev": "vite",
    "build": "vite build",
    "preview": "vite preview"
  }
}
```

## PHP integráció

### Vite helper függvények

`inc/vite.php`:

```php
<?php
/**
 * Vite integration for WordPress
 */

namespace MyTheme\Vite;

/**
 * Get Vite dev server status
 */
function is_dev_server_running(): bool {
    if ( ! defined( 'WP_DEBUG' ) || ! WP_DEBUG ) {
        return false;
    }

    $dev_server_url = 'http://localhost:5173';

    $response = @file_get_contents( $dev_server_url );
    return $response !== false;
}

/**
 * Get asset URL from manifest
 */
function get_asset_url( string $entry ): string {
    $manifest_path = get_template_directory() . '/dist/.vite/manifest.json';

    if ( ! file_exists( $manifest_path ) ) {
        return '';
    }

    $manifest = json_decode( file_get_contents( $manifest_path ), true );

    if ( ! isset( $manifest[ $entry ] ) ) {
        return '';
    }

    return get_template_directory_uri() . '/dist/' . $manifest[ $entry ]['file'];
}

/**
 * Get CSS files from manifest entry
 */
function get_css_files( string $entry ): array {
    $manifest_path = get_template_directory() . '/dist/.vite/manifest.json';

    if ( ! file_exists( $manifest_path ) ) {
        return [];
    }

    $manifest = json_decode( file_get_contents( $manifest_path ), true );

    if ( ! isset( $manifest[ $entry ]['css'] ) ) {
        return [];
    }

    return array_map( function( $css ) {
        return get_template_directory_uri() . '/dist/' . $css;
    }, $manifest[ $entry ]['css'] );
}

/**
 * Enqueue Vite assets
 */
function enqueue_assets(): void {
    if ( is_dev_server_running() ) {
        // Development mode - Vite dev server
        wp_enqueue_script(
            'vite-client',
            'http://localhost:5173/@vite/client',
            [],
            null,
            false
        );

        wp_enqueue_script(
            'theme-main',
            'http://localhost:5173/src/js/main.js',
            [],
            null,
            true
        );

        // Module típus beállítása
        add_filter( 'script_loader_tag', function( $tag, $handle ) {
            if ( in_array( $handle, [ 'vite-client', 'theme-main' ], true ) ) {
                return str_replace( '<script ', '<script type="module" ', $tag );
            }
            return $tag;
        }, 10, 2 );
    } else {
        // Production mode - built assets
        $js_url = get_asset_url( 'src/js/main.js' );

        if ( $js_url ) {
            wp_enqueue_script(
                'theme-main',
                $js_url,
                [],
                null,
                true
            );
        }

        // CSS betöltése
        foreach ( get_css_files( 'src/js/main.js' ) as $index => $css_url ) {
            wp_enqueue_style(
                'theme-style-' . $index,
                $css_url,
                [],
                null
            );
        }
    }
}
add_action( 'wp_enqueue_scripts', __NAMESPACE__ . '\\enqueue_assets' );
```

### functions.php

```php
<?php
// Vite helper betöltése
require_once get_template_directory() . '/inc/vite.php';
```

## JavaScript és CSS

### Entry point (src/js/main.js)

```javascript
// CSS importálása
import '../css/style.css';

// JavaScript
document.addEventListener('DOMContentLoaded', () => {
  console.log('Theme loaded!');

  // WordPress REST API példa
  fetch('/wp-json/wp/v2/posts')
    .then(response => response.json())
    .then(posts => {
      console.log('Posts:', posts);
    });
});

// HMR támogatás
if (import.meta.hot) {
  import.meta.hot.accept();
}
```

### CSS (src/css/style.css)

```css
/* Modern CSS */
:root {
  --color-primary: #0073aa;
  --color-secondary: #23282d;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: var(--color-secondary);
}

.button {
  background: var(--color-primary);
  color: white;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s;

  &:hover {
    background: color-mix(in srgb, var(--color-primary) 80%, black);
  }
}
```

## Sass támogatás

### Telepítés

```bash
npm install -D sass
```

### Használat

```javascript
// main.js
import '../scss/style.scss';
```

```scss
// style.scss
@use 'variables';
@use 'mixins';

body {
  font-family: variables.$font-family;
}
```

## PostCSS

### Telepítés

```bash
npm install -D postcss autoprefixer postcss-preset-env
```

### postcss.config.js

```javascript
export default {
  plugins: {
    'postcss-preset-env': {
      stage: 2,
      features: {
        'nesting-rules': true,
      },
    },
    autoprefixer: {},
  },
};
```

## Tailwind CSS integráció

### Telepítés

```bash
npm install -D tailwindcss postcss autoprefixer
npx tailwindcss init -p
```

### tailwind.config.js

```javascript
/** @type {import('tailwindcss').Config} */
export default {
  content: [
    './**/*.php',
    './src/**/*.{js,jsx,ts,tsx}',
  ],
  theme: {
    extend: {},
  },
  plugins: [],
};
```

### CSS

```css
/* style.css */
@tailwind base;
@tailwind components;
@tailwind utilities;
```

## React támogatás

### Telepítés

```bash
npm install react react-dom
npm install -D @vitejs/plugin-react
```

### vite.config.js

```javascript
import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';

export default defineConfig({
  plugins: [react()],
  // ... többi konfiguráció
});
```

### React komponens

```jsx
// src/js/components/App.jsx
import { useState } from 'react';

export default function App() {
  const [count, setCount] = useState(0);

  return (
    <div className="my-app">
      <h1>WordPress + Vite + React</h1>
      <button onClick={() => setCount(count + 1)}>
        Count: {count}
      </button>
    </div>
  );
}
```

### WordPress block integráció

```jsx
// src/js/blocks/my-block/index.jsx
import { registerBlockType } from '@wordpress/blocks';
import Edit from './edit';
import Save from './save';

registerBlockType('my-theme/my-block', {
  edit: Edit,
  save: Save,
});
```

## TypeScript támogatás

### Telepítés

```bash
npm install -D typescript
```

### tsconfig.json

```json
{
  "compilerOptions": {
    "target": "ES2020",
    "useDefineForClassFields": true,
    "module": "ESNext",
    "lib": ["ES2020", "DOM", "DOM.Iterable"],
    "skipLibCheck": true,
    "moduleResolution": "bundler",
    "allowImportingTsExtensions": true,
    "resolveJsonModule": true,
    "isolatedModules": true,
    "noEmit": true,
    "strict": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noFallthroughCasesInSwitch": true
  },
  "include": ["src"]
}
```

### TypeScript használata

```typescript
// src/js/main.ts
interface Post {
  id: number;
  title: { rendered: string };
  content: { rendered: string };
}

async function fetchPosts(): Promise<Post[]> {
  const response = await fetch('/wp-json/wp/v2/posts');
  return response.json();
}

fetchPosts().then(posts => {
  posts.forEach(post => {
    console.log(post.title.rendered);
  });
});
```

## Plugin fejlesztés

### vite.config.js (plugin)

```javascript
import { defineConfig } from 'vite';
import { resolve } from 'path';

export default defineConfig({
  build: {
    outDir: 'assets/dist',
    manifest: true,
    rollupOptions: {
      input: {
        frontend: resolve(__dirname, 'assets/src/js/frontend.js'),
        admin: resolve(__dirname, 'assets/src/js/admin.js'),
        'block-editor': resolve(__dirname, 'assets/src/js/block-editor.js'),
      },
    },
  },
});
```

### Plugin asset betöltés

```php
<?php
class My_Plugin_Assets {
    private static $manifest = null;

    public static function init() {
        add_action( 'wp_enqueue_scripts', [ __CLASS__, 'enqueue_frontend' ] );
        add_action( 'admin_enqueue_scripts', [ __CLASS__, 'enqueue_admin' ] );
        add_action( 'enqueue_block_editor_assets', [ __CLASS__, 'enqueue_block_editor' ] );
    }

    private static function get_manifest() {
        if ( self::$manifest === null ) {
            $manifest_path = plugin_dir_path( __FILE__ ) . 'assets/dist/.vite/manifest.json';
            if ( file_exists( $manifest_path ) ) {
                self::$manifest = json_decode( file_get_contents( $manifest_path ), true );
            } else {
                self::$manifest = [];
            }
        }
        return self::$manifest;
    }

    private static function get_asset_url( $entry ) {
        $manifest = self::get_manifest();
        if ( isset( $manifest[ $entry ] ) ) {
            return plugins_url( 'assets/dist/' . $manifest[ $entry ]['file'], __FILE__ );
        }
        return '';
    }

    public static function enqueue_frontend() {
        $url = self::get_asset_url( 'assets/src/js/frontend.js' );
        if ( $url ) {
            wp_enqueue_script( 'my-plugin-frontend', $url, [], null, true );
        }
    }

    public static function enqueue_admin( $hook ) {
        if ( 'toplevel_page_my-plugin' !== $hook ) {
            return;
        }

        $url = self::get_asset_url( 'assets/src/js/admin.js' );
        if ( $url ) {
            wp_enqueue_script( 'my-plugin-admin', $url, [], null, true );
        }
    }

    public static function enqueue_block_editor() {
        $url = self::get_asset_url( 'assets/src/js/block-editor.js' );
        if ( $url ) {
            wp_enqueue_script( 'my-plugin-blocks', $url, [ 'wp-blocks', 'wp-element' ], null, true );
        }
    }
}

My_Plugin_Assets::init();
```

## Hasznos pluginek

### vite-plugin-static-copy

```bash
npm install -D vite-plugin-static-copy
```

```javascript
import { viteStaticCopy } from 'vite-plugin-static-copy';

export default defineConfig({
  plugins: [
    viteStaticCopy({
      targets: [
        {
          src: 'src/images/*',
          dest: 'images',
        },
      ],
    }),
  ],
});
```

### vite-plugin-compression

```bash
npm install -D vite-plugin-compression
```

```javascript
import viteCompression from 'vite-plugin-compression';

export default defineConfig({
  plugins: [
    viteCompression({
      algorithm: 'gzip',
    }),
  ],
});
```

## Production build

```bash
# Build
npm run build

# Output ellenőrzése
ls -la dist/
```

### Build output

```
dist/
├── .vite/
│   └── manifest.json
├── js/
│   └── main.[hash].js
├── css/
│   └── style.[hash].css
└── assets/
    └── images/
```

## Források

- [Vite hivatalos oldal](https://vitejs.dev/)
- [Vite dokumentáció](https://vitejs.dev/guide/)
- [Vite plugin lista](https://vitejs.dev/plugins/)
- [Vite GitHub](https://github.com/vitejs/vite)