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
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.
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