Why broadcasting channel public not working? Laravel - laravel

Question

I use laravel 5.3
I make routes/channels.php like this :
<?php
Broadcast::channel('messages', function() {
return true;
});
If I input the data cart and click submit, it will run this :
this.$http.post(window.BaseUrl + '/guest/add-notification', {cart_data: JSON.stringify(data)});
It will call function on the controller
The function like this :
public function addNotification(Request $request){
$input = $request->only('cart_data');
$data = json_decode($input['cart_data'], true);
event(new CartNotificationEvent($data));
}
Then it will call event
The event like this :
<?php
namespace App\Events;
use Illuminate\Broadcasting\Channel;
use Illuminate\Queue\SerializesModels;
use Illuminate\Broadcasting\PrivateChannel;
use Illuminate\Broadcasting\PresenceChannel;
use Illuminate\Broadcasting\InteractsWithSockets;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
class CartNotificationEvent
{
use InteractsWithSockets, SerializesModels;
public $data;
public function __construct($data)
{
$this->data = $data;
}
public function broadcastWith()
{
return [
'message' => $this->data,
];
}
public function broadcastAs()
{
return 'newMessage';
}
public function broadcastOn()
{
return new Channel('messages');
}
}
On the client, I do like this :
Echo.channel('messages')
.listen('.newMessage', (message) => {
console.log('test')
console.log(message);
});
When all the code is executed, I check on the console, the console.log not display
Why is it not working?
If I see the whole code that I make, it seems the process is correct

Answer 1

class CartNotificationEvent implements ShouldBroadcast is missing.