This interface of this property is deprecated in the Navigation Timing Level 2
specification. Please use the
read-only property returns an
unsigned long long representing the moment,
in milliseconds since the UNIX epoch, when the
load event was sent for the
current document. If this event has not yet been sent, it returns
time = performanceTiming.loadEventStart;
The definition of 'PerformanceTiming.loadEventStart' in that specification.
BCD tables only load in the browser
PerformanceTiminginterface it belongs to.