The NavigatorOnLine interface contains methods and properties related to the connectivity status of the browser.

There is no object of type NavigatorOnLine, but other interfaces, like Navigator or WorkerNavigator, implement it.


The NavigatorOnLine interface doesn't inherit any property.

NavigatorOnLine.onLine Read only
Returns a Boolean indicating whether the browser is working online.


The NavigatorOnLine interface neither implements, nor inherit any method.


Specification Status Comment
HTML Living Standard
The definition of 'NavigatorOnLine' in that specification.
Living Standard No change from the latest snapshot, HTML5
The definition of 'NavigatorOnLine' in that specification.
Recommendation Snapshot of HTML Living Standard with its initial specification.

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!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)
on WorkerNavigator ? ? 29 (29) ? ? ?
Feature Android Chrome for Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)
on WorkerNavigator ? 29.0 (29) ? ? ? ? ?

See also

Document Tags and Contributors

 Contributors to this page: chrisdavidmills, abbycar, teoli
 Last updated by: chrisdavidmills,