The History.length read-only property returns an Integer representing the number of elements in the session history, including the currently loaded page. For example, for a page loaded in a new tab this property returns 1.


length = history.length;


var result = window.history.length; // Returns the size of the history of the current session.


Specification Status Comment
HTML Living Standard
The definition of 'History.length' in that specification.
Living Standard No change from HTML5.
The definition of 'History.length' in that specification.
Recommendation Initial definition.

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 (WebKit) Mozilla Servo
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes) implemented
Feature Android Edge Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

See also

  • The History interface it belongs to.

Document Tags and Contributors

 Contributors to this page: pandemm, chinazhaghai, erikadoyle, ea1000, fscholz, kscarfone, teoli
 Last updated by: pandemm,