The toJSON() method of the Performance interface is a standard serializer: it returns a JSON representation of the performance object's properties.


myPerf = performance.toJSON()



Return value

A JSON object that is the serialization of the Performance object.


var js;
js = window.performance.toJSON();
console.log("json = " + JSON.stringify(js));


Specification Status Comment
High Resolution Time Level 2
The definition of 'toJSON() serializer' in that specification.
Candidate Recommendation Defines toJson().

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 Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
toJSON() No support (Yes) 25.0 (25.0) ? No support No support
Feature Android Android Webview Edge Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile Chrome for Android
toJSON() No support No support (Yes) 25.0 (25.0) 1.2 (25.0) ? No support ? No support

Document Tags and Contributors

Contributors to this page: abbycar, jpmedley, rolfedh, AFBarstow
Last updated by: abbycar,