PHP code example of m2-boilerplate / module-critical-css

1. Go to this page and download the library: Download m2-boilerplate/module-critical-css library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

m2-boilerplate / module-critical-css example snippets




namespace Vendor\Module\Provider;

use Magento\Framework\App\Request\Http;
use Magento\Framework\App\RequestInterface;
use Magento\Framework\UrlInterface;
use Magento\Framework\View\LayoutInterface;
use Magento\Store\Api\Data\StoreInterface;
use M2Boilerplate\CriticalCss\Provider\ProviderInterface;
  
class CustomProvider implements ProviderInterface
{
    const NAME = 'custom_example';

    /**
     * @var UrlInterface
     */
    protected $url;

    public function __construct(UrlInterface $url)
    {
        $this->url = $url;
    }


    public function getUrls(StoreInterface $store): array
    {
        return [
            'contact_index_index' => $this->url->getUrl('contact'),
        ];
    }

    public function getName(): string
    {
        return self::NAME;
    }

    public function isAvailable(): bool
    {
        return true;
    }

    public function getPriority(): int
    {
        return 1200;
    }

    public function getCssIdentifierForRequest(RequestInterface $request, LayoutInterface $layout): ?string
    {
        if ($request->getModuleName() !== 'contact' || !$request instanceof Http) {
            return null;
        }
        
        if ($request->getFullActionName('_') === 'contact_index_index') {
            return 'contact_index_index';
        }

        return null;
    }
}