read-only property returns an
unsigned long long representing the moment,
in milliseconds since the UNIX epoch, right before the parser sent the
DOMContentLoaded event, that is right after all the scripts that need to be
executed right after parsing has been executed.
time = performanceTiming.domContentLoadedEventStart;
The definition of 'PerformanceTiming.domContentLoadedEventStart' in that specification.
BCD tables only load in the browser
PerformanceTiminginterface it belongs to.