html5 – 多个选项卡上的Webkit通知

我正在为我的应用程序使用WebKit Notifications.假如我使用此代码：

var n = window.webkitNotifications.createNotification(
   'icon.png','New Comment','Praveen commented on your post!'
);
n.onclick = function(x) { window.focus(); this.cancel(); };
n.show();

PS 1：前五行实际上是一行.为了便于阅读,我已经发布了这种方式.

PS 2：有关完整代码,请参阅：Unable to show Desktop Notifications using Google Chrome.

我的问题是,如果我打开了多个标签怎么办？

假设当我的应用程序上出现新评论时,这会被解雇.如果我打开多个标签怎么办？这会产生很多通知吗？说,我打开了10到15个标签,我收到了两个通知.将生成多少通知,20 – 30？

如果是这种情况,如何防止每个打开的选项卡多次生成单个通知？

解决方法

标记通知的详细说明只有最后一个出现才可用
on the MDN docs site

代码的摘录[以防万一文档失败]

HTML

<button>Notify me!</button>

window.addEventListener('load',function () {
  // At first,let's check if we have permission for notification
  // If not,let's ask for it
  if (Notification && Notification.permission !== "granted") {
    Notification.requestPermission(function (status) {
      if (Notification.permission !== status) {
        Notification.permission = status;
      }
    });
  }

  var button = document.getElementsByTagName('button')[0];

  button.addEventListener('click',function () {
    // If the user agreed to get notified
    // Let's try to send ten notifications
    if (Notification && Notification.permission === "granted") {
      for (var i = 0; i < 10; i++) {
        // Thanks to the tag,we should only see the "Hi! 9" notification
        var n = new Notification("Hi! " + i,{tag: 'soManyNotification'});
      }
    }

    // If the user hasn't told if he wants to be notified or not
    // Note: because of Chrome,we are not sure the permission property
    // is set,therefore it's unsafe to check for the "default" value.
    else if (Notification && Notification.permission !== "denied") {
      Notification.requestPermission(function (status) {
        if (Notification.permission !== status) {
          Notification.permission = status;
        }

        // If the user said okay
        if (status === "granted") {
          for (var i = 0; i < 10; i++) {
            // Thanks to the tag,we should only see the "Hi! 9" notification
            var n = new Notification("Hi! " + i,{tag: 'soManyNotification'});
          }
        }

        // Otherwise,we can fallback to a regular modal alert
        else {
          alert("Hi!");
        }
      });
    }

    // If the user refuses to get notified
    else {
      // We can fallback to a regular modal alert
      alert("Hi!");
    }
  });
});

原文链接：https://www.f2er.com/html5/168880.html

html5 – 多个选项卡上的Webkit通知

解决方法

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