PerformanceSoftNavigation: toJSON() method
The toJSON() method of the PerformanceSoftNavigation interface is a serializer; it returns a JSON representation of the PerformanceSoftNavigation object.
Syntax
js
toJSON()
Parameters
None.
Return value
A JSON object that is the serialization of the PerformanceSoftNavigation object.
Examples
Using the toJSON method
In this example, calling entry.toJSON() returns a JSON representation of the PerformanceSoftNavigation object.
js
const observer = new PerformanceObserver((list) => {
list.getEntries().forEach((entry) => {
console.log(entry.toJSON());
});
});
observer.observe({ type: "soft-navigation", buffered: true });
This would log a JSON object like so:
json
{
"duration": 41.4,
"entryType": "soft-navigation",
"interactionId": 1704,
"name": "https://www.example.com/#2",
"navigationId": 2463,
"navigationType": "push",
"paintTime": 2232.4,
"presentationTime": 2268,
"startTime": 2226.6
}
To get a JSON string, you can use JSON.stringify(entry) directly; it will call toJSON() automatically.