PerformanceTiming.unloadEventStart - Web APIs 编辑

This interface of this property is deprecated in the Navigation Timing Level 2 specification. Please use the PerformanceNavigationTiming interface instead.

The legacy PerformanceTiming.unloadEventStart read-only property returns an unsigned long long representing the moment, in miliseconds since the UNIX epoch, the unload event has been thrown. If there is no previous document, or if the previous document, or one of the needed redirects, is not of the same origin, the value returned is 0.

Syntax

time = performanceTiming.unloadEventStart;

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• The PerformanceTiming interface it belongs to.