NotRestoredReasonDetails: toJSON() method
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The toJSON() method of the NotRestoredReasonDetails interface returns a JSON-serializable plain object representing the NotRestoredReasonDetails object.
The method is automatically called by JSON.stringify() when a NotRestoredReasonDetails 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 NotRestoredReasonDetails object from the first navigation entry. Calling toJSON() directly returns a plain object. Its properties have the same values as the corresponding properties of the original object.
const navEntries = performance.getEntriesByType("navigation");
const navEntry = navEntries[0];
const reason = navEntry.notRestoredReasons.reasons[0];
const json = reason.toJSON();
console.log(json); // A plain object
console.log(typeof json); // "object"
console.log(json.reason); // Same value as reason.reason
Serializing to a JSON string
The object from the previous example is serialized using JSON.stringify(), which calls the toJSON() method automatically.
console.log(JSON.stringify(reason));
This would log a JSON string like so (formatted for readability):
{
"reason": "masked"
}
Specifications
| Specification |
|---|
| HTML # notrestoredreasondetails |