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Performance.toJSON

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

Note: This feature is available in Web Workers.

Syntax

myPerf = performance.toJSON()

Arguments

None

Return value

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

Example

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

Specifications

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

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support No Yes 25 ? No No
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support No No Yes 25 No No ?

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Performance/toJSON