讓 Laravel 可以用網頁預覽測試 Markdown Mail

web.php

<?php

// 省略...

Route::get('mails/user', function () {
    $markdown = new Illuminate\Mail\Markdown(view(), config('mail.markdown'));
    $user = \App\User::first();

    return $markdown->render('mails.user', [
        'user' => $user,
    ]);
});

// https://laracasts.com/discuss/channels/laravel/preview-markdown-emails