PerformanceTiming: unloadEventStart property
{{APIRef("Performance API")}} {{Deprecated_Header}}
[!WARNING] This interface of this property is deprecated in the Navigation Timing Level 2 specification. Please use the
{{domxref("PerformanceNavigationTiming")}}interface instead.
The legacy
PerformanceTiming.unloadEventStart
read-only property returns an unsigned long long representing the moment,
in milliseconds since the UNIX epoch, the {{domxref("Window/unload_event", "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.
Value
An unsigned long long.
Specifications
{{Specifications}}
Browser compatibility
{{Compat}}
See also
- The
{{domxref("PerformanceTiming")}}interface it belongs to.