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    The oldVersion property of the IDBVersionChangeEvent interface returns the old version number of the database.


    readonly    attribute unsigned long long  oldVersion;


    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;


    A 64-bit integer.


    Specification Status Comment
    Indexed Database API
    The definition of 'oldVersion' 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

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