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

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support. No support 58 (58) No support No support No support
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support. No support 58.0 (58) No support No support No support

Document Tags and Contributors

 Contributors to this page: chrisdavidmills, rolfedh, AFBarstow
 Last updated by: chrisdavidmills,