IDBVersionChangeEvent
import { IDBVersionChangeEvent } from "https://raw.githubusercontent.com/aaronhuggins/indexeddb/main/ponyfill.ts";This IndexedDB API interface indicates that the version of the database has changed, as the result of an IDBOpenDBRequest.onupgradeneeded event handler function.
interface IDBVersionChangeEvent extends Event {
readonly newVersion: number | null;
readonly oldVersion: number;
prototype: IDBVersionChangeEvent;
}const IDBVersionChangeEvent;