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    The IDBVersionChangeEvent interface of the IndexedDB API indicates that the version of the database has changed, as the result of an IDBOpenDBRequest.onupgradeneeded event handler function.

    Note: The specification has changed and some not up-to-date browsers only support the deprecated unique attribute, version, from an early draft version.


    IDBVersionChangeEvent.oldVersion Read only
    Returns the old version of the database.
    IDBVersionChangeEvent.newVersion Read only
    Returns the new version of the database.
    IDBVersionChangeEvent.version Read only

    The new version of the database in a versionchange transaction.

    Warning: While this property is still implemented in older browsers, the latest specification replaces it with the oldVersion and newVersion attributes. See the compatibility table to know what browsers support them.


    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.)

    var note = document.querySelector("ul");
    // In the following line, you should include the prefixes of implementations you want to test.
    window.indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB;
    // DON'T use "var indexedDB = ..." if you're not in a function.
    // Moreover, you may need references to some window.IDB* objects:
    window.IDBTransaction = window.IDBTransaction || window.webkitIDBTransaction || window.msIDBTransaction;
    window.IDBKeyRange = window.IDBKeyRange || window.webkitIDBKeyRange || window.msIDBKeyRange;
    // (Mozilla has never prefixed these objects, so we don't need window.mozIDB*)
    // Let us open version 4 of our database
    var DBOpenRequest ="toDoList", 4);
    // these two event handlers act on the database being opened successfully, or not
    DBOpenRequest.onerror = function(event) {
      note.innerHTML += '<li>Error loading database.</li>';
    DBOpenRequest.onsuccess = function(event) {
      note.innerHTML += '<li>Database initialised.</li>';
      // store the result of opening the database in the db variable. This is used a lot later on, for opening transactions and suchlike.
      db = DBOpenRequest.result;


    Specification Status Comment
    Indexed Database API
    The definition of 'IDBVersionChangeEvent' in that specification.
    Candidate Recommendation  

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
    version 12 webkit

    From 4.0 (2.0) to

    9.0 (9.0) moz

    Not supported Not supported Not supported
    oldVersion 23webkit

    10.0 (10.0) moz
    16.0 (16.0)

    10, partial 15 7.1
    newVersion 23webkit

    10.0 (10.0) moz
    16.0 (16.0)

    10, partial 15 7.1
    Feature Android Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile
    Basic support 4.4 22.0 (22.0) 1.0.1 10 22 Not supported

    See also

    Document Tags and Contributors

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    Last updated by: fscholz,