1. Web
  2. Web APIs
  3. WorkerNavigator
  4. setAppBadge()

WorkerNavigator: setAppBadge() method

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The setAppBadge() method of the WorkerNavigator interface sets a badge on the icon associated with this app. If a value is passed to the method, this will be set as the value of the badge. Otherwise the badge will display as a dot, or other indicator as defined by the platform.

Syntax

js
setAppBadge()
setAppBadge(contents)

Parameters

contents Optional

A number which will be used as the value of the badge. If contents is 0 then the badge will be set to nothing, indicating a cleared badge.

Return value

A Promise that resolves with undefined.

Exceptions

InvalidStateError DOMException

Thrown if the document is not fully active.

SecurityError DOMException

Thrown if the call was blocked by the same-origin policy.

NotAllowedError DOMException

Thrown if PermissionStatus.state is not granted.

Examples

In the example below an unread count is passed to setAppBadge(). The badge should then display 30.

js
const unread = 30;
navigator.setAppBadge(unread);

Specifications

This feature does not appear to be defined in any specification.

Browser compatibility

See also

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