Note: This feature is available in Web Workers.
Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The tag read-only property of the Notification interface signifies an identifying tag for the notification, as specified in the tag option of the Notification() constructor.
The idea of notification tags is that more than one notification can share the same tag, linking them together. One notification can then be programmatically replaced with another to avoid the users' screen being filled up with a huge number of similar notifications.
Syntax
var tag = Notification.tag;
Value
A DOMString.
Examples
Our Using the Notifications API article has a good example of tag usage.
Specifications
| Specification | Status | Comment |
|---|---|---|
| Notifications API The definition of 'tag' in that specification. |
Living Standard | Living standard |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
tag | Chrome Full support Yes | Edge Full support 14 | Firefox Full support Yes | IE No support No | Opera Full support Yes | Safari Full support Yes | WebView Android No support No | Chrome Android Full support Yes | Firefox Android Full support Yes | Opera Android Full support Yes | Safari iOS No support No | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- No support
- No support