This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The timeline readonly property of the Document interface represents the default timeline of the current document. This timeline is a special instance of DocumentTimeline that is automatically created on page load.

This timeline is unique to each document and persists for the lifetime of the document including calls to Document.open().

The time values for this timeline are calculated as a fixed offset from the global clock such that the zero time corresponds to the navigationStart moment plus a signed delta known as the origin time. Prior to establishing the navigationStart moment, the document timeline is inactive.

Note: A document timeline that is associated with a non-active document is also considered to be inactive.


var pageTimeline = document.timeline;
var thisMoment = pageTimeline.currentTime;


A DocumentTimeline object.


Specification Status Comment
Web Animations
The definition of 'document.timeline' in that specification.
Working Draft Editor's draft.

Browser compatibilityUpdate compatibility data on GitHub

Chrome Edge Firefox Internet Explorer Opera Safari
Basic support No No No
Currently only supported in Firefox Nightly (version 48).
Yes Yes Yes
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support No No No No
Currently only supported in Firefox Nightly (version 48).
Yes Yes ?

See also

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