IDBVersionChangeEvent: newVersion property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2021.

Note: This feature is available in Web Workers.

The newVersion read-only property of the IDBVersionChangeEvent interface returns the new version number of the database.

Value

A number that is a 64-bit integer or null if the database is being deleted.

Examples

In the following code snippet, we make a request to open a database, and include handlers for the success and error cases. These events are fired via the custom IDBVersionChangeEvent interface. For a full working example, see our To-do Notifications app (view example live).

js
const note = document.querySelector("ul");

// Let us open version 4 of our database
const DBOpenRequest = window.indexedDB.open("toDoList", 4);

// these two event handlers act on the database being opened
DBOpenRequest.onerror = (event) => {
  note.appendChild(document.createElement("li")).textContent =
    "Error loading database.";
};

DBOpenRequest.onsuccess = (event) => {
  note.appendChild(document.createElement("li")).textContent =
    "Database initialized.";

  // store the result of opening the database in the db variable.
  // This is used a lot later on, for opening transactions and suchlike.
  const db = DBOpenRequest.result;
};

Specifications

Specification
Indexed Database API 3.0
# dom-idbversionchangeevent-newversion

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
newVersion

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

See also