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---
title: "TaskAttributionTiming: toJSON() method"
short-title: toJSON()
slug: Web/API/TaskAttributionTiming/toJSON
page-type: web-api-instance-method
status:
- experimental
browser-compat: api.TaskAttributionTiming.toJSON
---
{{APIRef("Performance API")}}{{SeeCompatTable}}
The **`toJSON()`** method of the {{domxref("TaskAttributionTiming")}} interface is a {{Glossary("Serialization","serializer")}}; it returns a JSON representation of the {{domxref("TaskAttributionTiming")}} object.
## Syntax
```js-nolint
toJSON()
```
### Parameters
None.
### Return value
A {{jsxref("JSON")}} object that is the serialization of the {{domxref("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)`](/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify) directly; it will call `toJSON()` automatically.
## Specifications
{{Specifications}}
## Browser compatibility
{{Compat}}
## See also
- {{jsxref("JSON")}}