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Information about a single alarm. This object is returned from alarms.get() and alarms.getAll(), and is passed into the alarms.onAlarm listener.


Values of this type are objects. They contain the following properties:

string. Name of this alarm. This is the name that was passed into the alarms.create() call that created this alarm.
double. Time at which the alarm is scheduled to fire next, in milliseconds since the epoch.
double. If this is not null, then the alarm is periodic, and this represents its period in minutes.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxOperaSafariFirefox for Android
AlarmChrome Full support YesEdge Full support 79Firefox Full support 45Opera Full support YesSafari Full support 14Firefox Android Full support 48


Full support  
Full support

This API is based on Chromium's chrome.alarms API.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.

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