PerformanceNavigationTiming

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The PerformanceNavigationTiming interface provides methods and properties to store and retrieve metrics regarding the browser's document navigation events. For example, this interface can be used to determine how much time it takes to load or unload a document.

Properties

This interface extends the following PerformanceEntry properties for navigation performance entry types by qualifying and constraining them as follows:

PerformanceEntry.entryType Read only
Returns "navigation".
PerformanceEntry.name Read only
Returns the document's address.
PerformanceEntry.startTime Read only
Returns a DOMHighResTimeStamp with a value of "0".
PerformanceEntry.duration Read only
Returns a timestamp that is the difference between the PerformanceNavigationTiming.loadEventEnd and PerformanceEntry.startTime properties.

The interface also supports the following properties:

PerformanceNavigationTiming.domComplete Read only
A DOMHighResTimeStamp representing a time value equal to the time immediately before the browser sets the current document readiness of the current document to complete.
PerformanceNavigationTiming.domContentLoadedEventEnd Read only
A DOMHighResTimeStamp representing the time value equal to the time immediately after the current document's DOMContentLoaded event completes.
PerformanceNavigationTiming.domContentLoadedEventStart Read only
A DOMHighResTimeStamp representing the time value equal to the time immediately before the user agent fires the DOMContentLoaded event at the current document.
PerformanceNavigationTiming.domInteractive Read only
A DOMHighResTimeStamp representing a timestamp representing the time value equal to the time immediately before the user agent sets the current document readiness of the current document to interactive.
PerformanceNavigationTiming.loadEventEnd Read only
A DOMHighResTimeStamp representing the time when the load event of the current document is completed.
PerformanceNavigationTiming.loadEventStart Read only
A DOMHighResTimeStamp representing the time value equal to the time immediately before the load event of the current document is fired.
PerformanceNavigationTiming.redirectCount Read only
A number representing the number of redirects since the last non-redirect navigation under the current browsing context.
PerformanceNavigationTiming.type Read only
A string representing the navigation type. Must be: "navigate", "reload", "back_forward" or "prerender".
PerformanceNavigationTiming.unloadEventEnd Read only
A DOMHighResTimeStamp representing the time value equal to the time immediately after the user agent finishes the unload event of the previous document.
PerformanceNavigationTiming.unloadEventStart Read only
A DOMHighResTimeStamp representing the time value equal to the time immediately before the user agent starts the unload event of the previous document.

Methods

PerformanceNavigationTiming.toJSON()
Returns a DOMString that is the JSON representation of the PerformanceNavigationTiming object.

Specifications

Specification Status Comment
Navigation Timing Level 2
The definition of 'PerformanceNavigationTiming' in that specification.
Working Draft Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic support
Experimental
Chrome Full support 57Edge Full support YesFirefox Full support 58
Notes
Full support 58
Notes
Notes You can disable this feature using the dom.enable_performance_navigation_timing preference (see bug 1403926).
IE No support NoOpera Full support 44Safari No support NoWebView Android Full support 57Chrome Android Full support 57Edge Mobile Full support YesFirefox Android Full support 58
Notes
Full support 58
Notes
Notes You can disable this feature using the dom.enable_performance_navigation_timing preference (see bug 1403926).
Opera Android Full support 44Safari iOS No support NoSamsung Internet Android Full support 7.0
domComplete
Experimental
Chrome Full support 57Edge Full support 12Firefox Full support 58IE No support NoOpera Full support 44Safari No support NoWebView Android Full support 57Chrome Android Full support 57Edge Mobile Full support YesFirefox Android Full support 58Opera Android Full support 44Safari iOS No support NoSamsung Internet Android Full support 7.0
domContentLoadedEventEnd
Experimental
Chrome Full support 57Edge Full support 12Firefox Full support 58IE No support NoOpera Full support 44Safari No support NoWebView Android Full support 57Chrome Android Full support 57Edge Mobile Full support YesFirefox Android Full support 58Opera Android Full support 44Safari iOS No support NoSamsung Internet Android Full support 7.0
domContentLoadedEventStart
Experimental
Chrome Full support 57Edge Full support YesFirefox Full support 58IE No support NoOpera Full support 44Safari No support NoWebView Android Full support 57Chrome Android Full support 57Edge Mobile Full support YesFirefox Android Full support 58Opera Android Full support 44Safari iOS No support NoSamsung Internet Android Full support 7.0
domInteractive
Experimental
Chrome Full support 57Edge Full support 12Firefox Full support 58IE No support NoOpera Full support 44Safari No support NoWebView Android Full support 57Chrome Android Full support 57Edge Mobile Full support YesFirefox Android Full support 58Opera Android Full support 44Safari iOS No support NoSamsung Internet Android Full support 7.0
loadEventEnd
Experimental
Chrome Full support 57Edge Full support 12Firefox Full support 58IE No support NoOpera Full support 44Safari No support NoWebView Android Full support 57Chrome Android Full support 57Edge Mobile Full support YesFirefox Android Full support 58Opera Android Full support 44Safari iOS No support NoSamsung Internet Android Full support 7.0
loadEventStart
Experimental
Chrome Full support 57Edge Full support YesFirefox Full support 58IE No support NoOpera Full support 44Safari No support NoWebView Android Full support 57Chrome Android Full support 57Edge Mobile Full support YesFirefox Android Full support 58Opera Android Full support 44Safari iOS No support NoSamsung Internet Android Full support 7.0
redirectCount
Experimental
Chrome Full support 57Edge Full support 12Firefox Full support 58IE No support NoOpera Full support 44Safari No support NoWebView Android Full support 57Chrome Android Full support 57Edge Mobile Full support YesFirefox Android Full support 58Opera Android Full support 44Safari iOS No support NoSamsung Internet Android Full support 7.0
type
Experimental
Chrome Full support 57Edge Full support 12Firefox Full support 58IE No support NoOpera Full support 44Safari No support NoWebView Android Full support 57Chrome Android Full support 57Edge Mobile Full support YesFirefox Android Full support 58Opera Android Full support 44Safari iOS No support NoSamsung Internet Android Full support 7.0
unloadEventEnd
Experimental
Chrome Full support 57Edge Full support 12Firefox Full support 58IE No support NoOpera Full support 44Safari No support NoWebView Android Full support 57Chrome Android Full support 57Edge Mobile Full support YesFirefox Android Full support 58Opera Android Full support 44Safari iOS No support NoSamsung Internet Android Full support 7.0
unloadEventStart
Experimental
Chrome Full support 57Edge Full support YesFirefox Full support 58IE No support NoOpera Full support 44Safari No support NoWebView Android Full support 57Chrome Android Full support 57Edge Mobile Full support YesFirefox Android Full support 58Opera Android Full support 44Safari iOS No support NoSamsung Internet Android Full support 7.0
toJSON
Experimental
Chrome Full support 57Edge Full support YesFirefox Full support 58IE No support NoOpera Full support 44Safari No support NoWebView Android Full support 57Chrome Android Full support 57Edge Mobile Full support YesFirefox Android Full support 58Opera Android Full support 44Safari iOS No support NoSamsung Internet Android Full support 7.0

Legend

Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
See implementation notes.
See implementation notes.

See also

Document Tags and Contributors

Last updated by: sideshowbarker,