WorkerNavigator: setAppBadge() method
Secure context: This feature is available only insecure contexts (HTTPS), in some or allsupporting browsers.
ThesetAppBadge() method of theWorkerNavigator 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
setAppBadge()setAppBadge(contents)Parameters
contentsOptionalA
numberwhich will be used as the value of the badge. Ifcontentsis0then the badge will be set tonothing, indicating a cleared badge.
Return value
Exceptions
InvalidStateErrorDOMExceptionThrown if the document is not fully active.
SecurityErrorDOMExceptionThrown if the call was blocked by thesame-origin policy.
NotAllowedErrorDOMExceptionThrown if
PermissionStatus.stateis notgranted.
Examples
In the example below an unread count is passed tosetAppBadge(). The badge should then display30.
const unread = 30;navigator.setAppBadge(unread);