ClientHint.php

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Config;

class ClientHint
{
    /**
     * Handle an incoming request.
     *
     * @param \Illuminate\Http\Request $request
     * @param \Closure                 $next
     *
     * @return mixed
     */
    public function handle(Request $request, Closure $next)
    {
        if (strpos($request->header('accept'), 'image/webp')) {
            $defaults = Config::get('images.defaults');
        
            Config::set('images.defaults', array_merge($defaults, [
                'fm' => 'webp',
            ]));
        }

        return $next($request);
    }
}