IDBDatabase.onversionchange

The onversionchange event handler of the IDBDatabase interface handles the versionchange event, fired when a database structure change (IDBOpenDBRequest.onupgradeneeded event or IDBFactory.deleteDatabase) was requested elsewhere (most probably in another window/tab on the same computer).

This is different from the versionchange transaction (but it is related).

Note: This feature is available in Web Workers.

Syntax

IDBDatabase.onversionchange = function(event) { ... }

Example

This example shows an IDBOpenDBRequest.onupgradeneeded block that creates a new object store; it also includes onerror and onabort functions to handle non-success cases, and an onversionchange function to notify when a database structure change has occurred.

request.onupgradeneeded = function(event) {
  var db = event.target.result;
    
  db.onerror = function(event) {
    note.innerHTML += '<li>Error opening database.</li>';
  };

  db.onabort = function(event) {
    note.innerHTML += '<li>Database opening aborted!</li>';
  };

  // Create an objectStore for this database
    
  var 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 });

  objectStore.createIndex("notified", "notified", { unique: false });
    
  note.innerHTML += '<li>Object store created.</li>';
    
  db.onversionchange = function(event) {
    note.innerHTML += '<li>a database change has occurred; you should refresh this
                       browser window, or close it down and use the other open version of
                       this application, wherever it exists.</li>';
  };
};

Specifications

Specification Status Comment
Indexed Database API
The definition of 'onversionchange' in that specification.
Recommendation  
Indexed Database API 2.0
The definition of 'onversionchange' in that specification.
Recommendation  

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic supportChrome Full support 24
Full support 24
No support 23 — 24
Prefixed
Prefixed Implemented with the vendor prefix: webkit
Edge ? Firefox Full support 16
Full support 16
No support 10 — 16
Prefixed
Prefixed Implemented with the vendor prefix: moz
IE Full support 10
Notes
Full support 10
Notes
Notes partial
Opera Full support 15Safari Full support 7WebView Android Full support YesChrome Android Full support YesEdge Mobile ? Firefox Android Full support 22Opera Android Full support 22Safari iOS Full support 8Samsung Internet Android Full support Yes

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
See implementation notes.
See implementation notes.
Requires a vendor prefix or different name for use.
Requires a vendor prefix or different name for use.

See also

Document Tags and Contributors

Contributors to this page: CITguy, fscholz, jpmedley, chrisdavidmills
Last updated by: CITguy,