Javascript 推送事件被触发两次

我使用Pusher（Pusher.com）在管理员发送通知时触发对所有登录客户端的通知

出于某种原因，这一事件发生了两次，尽管我只触发了一次

客户端订阅代码：

var handleToastrListener = function() {

     var pusher = new Pusher("913284db62a0cc237db4");
     var channel = pusher.subscribe('toastr-channel');

           channel.bind('new-toast', function(data) {

            toastr.options = data.options;
            var $toast = toastr[data.scf](data.msg, data.title);

           return true;

           });  
   }

       handleToastrListener();

服务器端发布代码（使用pusher包的PHP）：

Pusher调试控制台显示只收到一条消息

但是，pusher js Javascript日志显示两条消息：

Pusher : Event recd : {"event":"new-toast","data":{"options":{"positionClass":"toast-top-right","onclick":"","showDuration":"1000","hideDuration":"1000","timeOut":"5000","extendedTimeOut":"1000","showEasing":"swing","hideEasing":"linear","showMethod":"fadeIn","hideMethod":"fadeOut"},"title":"Toastr Notifications","msg":"Gnome & Growl type non-blocking notifications","scf":"success"},"channel":"toastr-channel"} app.js:143
Pusher : Event recd : {"event":"new-toast","data":{"options":{"positionClass":"toast-top-right","onclick":"","showDuration":"1000","hideDuration":"1000","timeOut":"5000","extendedTimeOut":"1000","showEasing":"swing","hideEasing":"linear","showMethod":"fadeIn","hideMethod":"fadeOut"},"title":"Toastr Notifications","msg":"Gnome & Growl type non-blocking notifications","scf":"success"},"channel":"toastr-channel"}

进一步查看，我发现订阅发生了两次，尽管我只调用了一次：

Pusher : Event sent : {"event":"pusher:subscribe","data":{"channel":"toastr-channel"}} app.js:143
Pusher : Event recd : {"event":"pusher_internal:subscription_succeeded","data":{},"channel":"toastr-channel"} app.js:143
Pusher : No callbacks on toastr-channel for pusher:subscription_succeeded app.js:143
Pusher : State changed : connecting -> connected app.js:143
Pusher : Event sent : {"event":"pusher:subscribe","data":{"channel":"toastr-channel"}} app.js:143
Pusher : Event recd : {"event":"pusher_internal:subscription_succeeded","data":{},"channel":"toastr-channel"} app.js:143
Pusher : No callbacks on toastr-channel for pusher:subscription_succeeded 

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有两件事你一定要注意，并适当地更新你的问题：

-活动是否在其中显示了两次

-事件是否记录为传入两次

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这里的另一个常见问题是，有时事件可能绑定到两次—因此，两次回调。但是，您的代码并不表明发生了这种情况。

调试控制台只显示一条消息，而日志显示两条消息。我已经相应地更新了我的问题好吧，那太尴尬了。结果是我在代码中的不同位置调用了两次句柄

Pusher : Event sent : {"event":"pusher:subscribe","data":{"channel":"toastr-channel"}} app.js:143
Pusher : Event recd : {"event":"pusher_internal:subscription_succeeded","data":{},"channel":"toastr-channel"} app.js:143
Pusher : No callbacks on toastr-channel for pusher:subscription_succeeded app.js:143
Pusher : State changed : connecting -> connected app.js:143
Pusher : Event sent : {"event":"pusher:subscribe","data":{"channel":"toastr-channel"}} app.js:143
Pusher : Event recd : {"event":"pusher_internal:subscription_succeeded","data":{},"channel":"toastr-channel"} app.js:143
Pusher : No callbacks on toastr-channel for pusher:subscription_succeeded