NotRestoredReasons: toJSON() method

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

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

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

Syntax

toJSON()

Parameters

None.

Return value

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

Examples

The following function will return a JSON representation of the NotRestoredReasons object of the first PerformanceNavigationTiming object currently present in the performance timeline:

function returnNRR() {
  const navEntries = performance.getEntriesByType("navigation");
  let navEntry = navEntries[0];
  return navEntry.notRestoredReasons.toJSON();
}

Specifications

Specification
HTML # notrestoredreasons