Set conditional object properties

You can use the when() or unless() methods in your MailMessage notifications to set conditional object properties like a call to action.

 1class InvoicePaid extends Notification
 2{
 3    public function toMail(User $user)
 4    {
 5        return (new MailMessage)
 6            ->success()
 7            ->line('We've received your payment)
 8            ->when($user->isOnMonthlyPaymentPlan(), function (MailMessage $message) {
 9                $message->action('Save 20% by paying yearly', route('account.billing'));
10            })
11            ->line('Thank you for using Unlock.sh');
12    }
13}

Use the when or unless methods in you own classes by using the Illuminate\Support\Traits\Conditionable trait

Tip given by @Philo01