TaskAttributionTiming: toJSON() method

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

The toJSON() method of the TaskAttributionTiming interface is a serializer; it returns a JSON representation of the TaskAttributionTiming object.

Syntax

js

toJSON()

Parameters

None.

Return value

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

Examples

Using the toJSON method

In this example, calling entry.toJSON() returns a JSON representation of the TaskAttributionTiming object.

js

const observer = new PerformanceObserver((list) => {
  list.getEntries().forEach((entry) => {
    console.log(entry.toJSON());
  });
});

observer.observe({ type: "taskattribution", buffered: true });

This would log a JSON object like so:

json

{
  "name": "unknown",
  "entryType": "taskattribution",
  "startTime": 0,
  "duration": 0,
  "containerType": "window",
  "containerSrc": "",
  "containerId": "",
  "containerName": ""
}

To get a JSON string, you can use JSON.stringify(entry) directly; it will call toJSON() automatically.

Specifications

Specification
Long Tasks API
# dom-taskattributiontiming-tojson

Browser compatibility

BCD tables only load in the browser

See also