IDBFactory

« IDBFactory

Methods

IDBFactory.open

The current method to request opening a connection to a database.

IDBFactory.open

An obsolete method to request opening a connection to a database, still implemented by some browsers.

IDBFactory.deleteDatabase

A method to request the deletion of a database.

IDBFactory.cmp

A method that compares two keys and returns a result indicating which one is greater in value.

Example

In the following code snippet, we open a database asynchronously and make a request:

// 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 request = window.indexedDB.open("toDoList", 4);

  // these two event handlers act on the database being opened successfully, or not
  request.onerror = function(event) {
    note.innerHTML += '<li>Error loading database.</li>';
  };
 
  request.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 = request.result;
  };

Specifications

Browser compatibility