GeolocationCoordinates: toJSON() method
Baseline 2024
Newly available
Since September 2024, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.
The toJSON() method of the GeolocationCoordinates interface returns a JSON-serializable plain object representing the GeolocationCoordinates object.
The method is automatically called by JSON.stringify() when a GeolocationCoordinates object is encountered during JSON serialization.
Syntax
toJSON()
Parameters
None.
Return value
A JSON-serializable plain object containing the following properties:
Each property's value is copied as-is.
Examples
Calling toJSON() directly
This example obtains a GeolocationCoordinates object. Calling toJSON() directly returns a plain object. Its properties have the same values as the corresponding properties of the original object.
navigator.geolocation.getCurrentPosition((position) => {
const coords = position.coords;
const json = coords.toJSON();
console.log(json); // A plain object
console.log(typeof json); // "object"
console.log(json.latitude); // Same value as coords.latitude
});
Serializing to a JSON string
Within the callback from the previous example, the same object can be serialized using JSON.stringify(), which calls the toJSON() method automatically.
console.log(JSON.stringify(coords));
This would log a JSON string like so (formatted for readability):
{
"accuracy": 12.5,
"latitude": 53.125,
"longitude": 8.75,
"altitude": null,
"altitudeAccuracy": null,
"heading": null,
"speed": null
}
Specifications
| Specification |
|---|
| Geolocation # tojson-method-0 |