Javascript 对于Web，如果同一应用程序在多个选项卡中打开，则会收到多个firebase通知

我正在使用@angular/fire作为angular 7的firebase推送通知。我收到的通知与我的应用程序在多个选项卡中打开的时间相同

receiveMessage() {
    this.angularFireMessaging.messages.subscribe(
      (payload) => {
        console.log("new message received. ", payload);
        // this.currentMessage.next(payload);
        console.log(thisref._router.url);
        if(thisr[enter image description here][1]ef._router.url == '/playGame' && payload.data.gameId == window.localStorage.getItem(environment.gameId)) {
          return
        } else{
          var notificationTitle = payload.notification.title;
          var notificationOptions = {
            body : payload.notification.body,
            icon : payload.notification.icon,
            // click_action : payload.notification.click_action
          };
          console.log(notificationOptions);
          var notification = new Notification(notificationTitle,notificationOptions);
          notification.onclick = function(event) {
              // event.preventDefault(); // prevent the browser from focusing the Notification's tab
              window.open(payload.notification.click_action , '_self');
              // notification.close();
          }
        }
      })
}

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我在前台的浏览器中得到了每个标签的一个通知。所以我设置了下面的代码，它对我起作用了

if (!document.hidden) {
            var notificationTitle = payload.notification.title;
            var notificationOptions = {
              body : payload.notification.body,
              icon : payload.notification.icon,
              // click_action : payload.notification.click_action
            };
            console.log(notificationOptions);
            var notification = new Notification(notificationTitle,notificationOptions);
            notification.onclick = function(event) {
                // event.preventDefault(); // prevent the browser from focusing the Notification's tab
                window.open(payload.notification.click_action , '_self');
                // notification.close();
            }
          }

---

这不是意料之中的事吗？每个选项卡都订阅了该通知，并将独立于其他选项卡进行处理。我希望一次只收到一个通知。打开多少选项卡并不重要。你能帮帮我吗？这个@AshwiniPrajapati有什么解决方案吗？如果活动选项卡不是我的网站怎么办？在这种情况下，我想通知将被跳过