read-only property returns an
unsigned long long representing the moment,
in milliseconds since the UNIX epoch, right after all the scripts that need to be
executed as soon as possible, in order or not, has been executed.
time = performanceTiming.domContentLoadedEventEnd;
The definition of 'PerformanceTiming.domContentLoadedEventEnd' in that specification.
BCD tables only load in the browser
PerformanceTiminginterface it belongs to.