Notification.close() - Web API 接口参考 编辑

Notification 接口的 close() 的方法用于关闭一个以前显示的通知。

Syntax

Notification.close();

Parameters

None.

Returns

Void.

Examples

以下是 Emogotchi 示例（在线演示）中的一段代码 ，定义了一个简单的函数spawnNotification，当spawnNotification被调用时会创建一个对象并生成一个新的Notification。在函数的最后，它在setTimeout() 中调用了close()函数来实现在4s后关闭Notification（有些浏览器会自动关闭弹出的Notification，但有些不是，例如Chrome,Opera）。还要注意bind()的使用，来确保close()方法绑定到Notification的实例上。

function spawnNotification(theBody,theIcon,theTitle) {
  var options = {
      body: theBody,
      icon: theIcon
  }

  var n = new Notification(theTitle,options);
  setTimeout(n.close.bind(n), 4000);
}

Specifications

Specification	Status	Comment
Notifications API	Living Standard	Living standard

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

• Desktop
• Mobile

Feature	Chrome	Edge	Firefox (Gecko)	Internet Explorer	Opera	Safari
Basic support	5webkit[1] 22	(Yes)	4.0 (2.0)moz[2] 22.0 (22.0)	未实现	25	6[3]

Feature	Android	Android Webview	Edge	Firefox Mobile (Gecko)	Firefox OS	IE Mobile	Opera Mobile	Safari Mobile	Chrome for Android
Basic support	?	(Yes)	(Yes)	4.0 (4.0)moz[2] 22.0 (22.0)	1.0.1moz[2] 1.2	未实现	?	未实现	(Yes)

[1] Before Chrome 22, the support for notification followed an old prefixed version of the specification and used the navigator.webkitNotifications object to instantiate a new notification.

Before Chrome 32, Notification.permission was not supported.

Before Chrome 42, service worker additions were not supported.

[2] Prior to Firefox 22 (Firefox OS <1.2), the instantiation of a new notification must be done with the navigator.mozNotification object through its createNotification method.

Prior to Firefox 22 (Firefox OS <1.2), the Notification was displayed when calling the show method and supported only the click and close events.

Nick Desaulniers wrote a Notification shim to cover both newer and older implementations.

One particular Firefox OS issue is that you can pass a path to an icon to use in the notification, but if the app is packaged you cannot use a relative path like /my_icon.png. You also can't use window.location.origin + "/my_icon.png" because window.location.origin is null in packaged apps. The manifest origin field fixes this, but it is only available in Firefox OS 1.1+. A potential solution for supporting Firefox OS <1.1 is to pass an absolute URL to an externally hosted version of the icon. This is less than ideal as the notification is displayed immediately without the icon, then the icon is fetched, but it works on all versions of Firefox OS.

When using notifications  in a Firefox OS app, be sure to add the desktop-notification permission in your manifest file. Notifications can be used at any permission level, hosted or above: "permissions": { "desktop-notification": {} }

[3] Safari started to support notification with Safari 6, but only on Mac OSX 10.8+ (Mountain Lion).

See also

• Using the Notifications API