PerformanceContainerTiming: presentationTime property

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

The presentationTime read-only property of the PerformanceContainerTiming interface returns the timestamp when the container's newly-painted content was actually drawn on the screen.

The algorithm for getting the presentationTime timestamp is implementation-defined, and may return null. Note that PerformanceContainerTiming.paintTime is a more reliable property to use for metrics that need to be comparable across browsers.