Laravel 自定義檢視元件

Laravel 的檢視合成器可將資料與指定檢視繫結在一起，避免了重複編寫程式碼。

View::composer('profile', 'App\Http\View\Composers\ProfileComposer');

由於資料的生成和渲染是分開進行的，理解起來不夠直觀。因此，可以採用檢視元件的方式將兩者進行封裝。

<?php

namespace App\ViewComponents;

use Illuminate\Contracts\Support\Htmlable;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\View;

class ExampleComponent implements Htmlable
{
    private $color;

    private $request;

    public function __construct(Request $request, string $color)
    {
        $this->color = $color;
        $this->request = $request;
    }

    public function toHtml()
    {   
        return View::make('example')
            ->with('color', $this->color)
            ->render();
    }
}

在檢視中使用

{{ app()->makeWith(App\ViewComponents\ExampleComponent::class,['color' => 'green'])->toHtml() }}

封裝指令

Blade::directive('render', function ($expression) {
    list($class, $params) = explode(',', $expression, 2);
    $class = "App\\ViewComponents\\".trim($class, '\'" ');
    return "<?php echo app()->makeWith('$class', $params)->toHtml(); ?>";
});

使用指令

@render('ExampleComponent', ['color' => 'green'])

參考資料

• spatie/laravel-view-components: A better way to connect data with view rendering in Laravel
• Introducing View Components in Laravel, an alternative to View Composers - Laravel News

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