Enable Cors Middleware

EnableCors.php

<?php

namespace App\Http\Middleware;

use Closure;

class EnableCors
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request $request
     * @param  \Closure $next
     * @return mixed
     */

    public function handle($request, Closure $next)
    {
        $response = $next($request);
        $response->headers->set('Access-Control-Allow-Origin', '*');
        $response->headers->set('Access-Control-Allow-Methods', 'POST, GET, OPTIONS, PUT, DELETE');
        $response->headers->set('Access-Control-Allow-Headers', 'Content-Type, Accept, Authorization, X-Requested-With, Application');

        return $response;
    }
}

linha a ser adicionada no arquivo kernel.php

app/Http/kernel.php

protected $middleware = [
    \App\Http\Middleware\EnableCors::class,
];