PerformanceTiming.unloadEventStart

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

Specification Status Comment
Navigation Timing
The definition of 'PerformanceTiming.unloadEventStart' in that specification.
Recommendation Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
unloadEventStart
Deprecated
Chrome Full support 6Edge Full support 12Firefox Full support 7IE Full support 9Opera Full support 15Safari Full support 11WebView Android Full support YesChrome Android Full support 18Firefox Android Full support 7Opera Android Full support 14Safari iOS Full support 11Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
Deprecated. Not for use in new websites.
Deprecated. Not for use in new websites.

See also