PerformanceTiming.navigationStart

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

The legacy PerformanceTiming.navigationStart read-only property returns an unsigned long long representing the moment, in milliseconds since the UNIX epoch, right after the prompt for unload terminates on the previous document in the same browsing context. If there is no previous document, this value will be the same as PerformanceTiming.fetchStart.

Syntax

time = performanceTiming.navigationStart;

Specifications

Specification Status Comment
Navigation Timing
The definition of 'PerformanceTiming.navigationStart' 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
navigationStart
Deprecated
Chrome Full support 6Edge Full support 12Firefox Full support 7IE Full support 9Opera Full support 15Safari Full support YesWebView Android Full support YesChrome Android Full support 18Firefox Android Full support 7Opera Android Full support 14Safari iOS Full support YesSamsung 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

Document Tags and Contributors

Last updated by: nomaed,