Web/API/IDBDatabase/versionchange event

The versionchange event is fired when a database structure change (IDBOpenDBRequest.onupgradeneeded event or IDBFactory.deleteDatabase) was requested.

Bubbles	No
Cancelable	No
Interface	Event
Event handler property	onversionchange

Examples

This example opens a database and, on success, adds a listener to versionchange:

// Open the database
const dBOpenRequest = window.indexedDB.open('Nonexistent', 4);

dBOpenRequest.onupgradeneeded = event => {
  const db = event.target.result;
  // Create an objectStore for this database
  const objectStore = db.createObjectStore('toDoList', { keyPath: 'taskTitle' });

  // define what data items the objectStore will contain
  objectStore.createIndex('hours', 'hours', { unique: false });
  objectStore.createIndex('minutes', 'minutes', { unique: false });
  objectStore.createIndex('day', 'day', { unique: false });
  objectStore.createIndex('month', 'month', { unique: false });
  objectStore.createIndex('year', 'year', { unique: false });
};

dBOpenRequest.addEventListener('success', event => {
  const db = event.target.result;
  db.addEventListener('versionchange', event => {
    console.log('The version of this database has changed');
  });

});

The same example, using the onversionchange event handler property:

// Open the database
const dBOpenRequest = window.indexedDB.open('Nonexistent', 4);

dBOpenRequest.onupgradeneeded = event => {
  const db = event.target.result;
  // Create an objectStore for this database
  const objectStore = db.createObjectStore('toDoList', { keyPath: 'taskTitle' });

  // define what data items the objectStore will contain
  objectStore.createIndex('hours', 'hours', { unique: false });
  objectStore.createIndex('minutes', 'minutes', { unique: false });
  objectStore.createIndex('day', 'day', { unique: false });
  objectStore.createIndex('month', 'month', { unique: false });
  objectStore.createIndex('year', 'year', { unique: false });
};

dBOpenRequest.onsuccess = event => {
  const db = event.target.result;
  db.onversionchange = event => {
    console.log('The version of this database has changed');
  };

};

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
versionchange event	Chrome Full support 24 Full support 24 No support 23 — 24 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support 12	Firefox Full support 16 Full support 16 No support 10 — 16 Prefixed' Prefixed' Implemented with the vendor prefix: moz	IE Partial support 10	Opera Full support 15	Safari Full support 7	WebView Android Full support Yes	Chrome Android Full support 25	Firefox Android Full support 22	Opera Android Full support 14	Safari iOS Full support 8	Samsung Internet Android Full support 1.5

Legend

Full support  

Full support

Partial support  

Partial support

Requires a vendor prefix or different name for use.'

Requires a vendor prefix or different name for use.

See also

• Using IndexedDB
• onversionchange event handler property

IDBDatabase: versionchange event by Mozilla Contributors is licensed under CC-BY-SA 2.5.