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

The toJSON() method is a serializer - it returns a JSON representation of the PerformanceNavigationTiming object.


json = resourcePerfEntry.toJSON();



Return value

A JSON object that is the serialization of the PerformanceNavigationTiming object as a map with entries from the closest inherited interface and with entries for each of the serializable attributes.


// Get a resource performance entry
var perfEntries = performance.getEntriesByType("navigation");
var entry = perfEntries[0];

// Get the JSON and log it
var json = entry.toJSON();
var s = JSON.stringify(json);
console.log("PerformanceNavigationTiming.toJSON() = " + s);


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

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
toJSONChrome Full support 43Edge Full support ā‰¤18Firefox Full support 40IE No support NoOpera Full support 30Safari Full support 11WebView Android Full support 43Chrome Android Full support 43Firefox Android Full support 42Opera Android Full support 30Safari iOS Full support 11Samsung Internet Android Full support 4.0


Full support Ā 
Full support
No support Ā 
No support