{{APIRef()}}
The IDBOpenDBRequest
interface of the IndexedDB API provides access to results of requests to open or delete databases using specific event handler attributes.
Inherits from: {{domxref("IDBRequest")}}
Methods
No methods.
Properties
Event handlers
- {{domxref("IDBOpenDBRequest.onblocked")}}
-
The event handler for the blocked event. This event is triggered when the
upgradeneeded
should be triggered because of a version change but the database is still in use (ie not closed) somewhere, even after theversionchange
event was sent. - {{domxref("IDBOpenDBRequest.onupgradeneeded")}}
-
The event handler for the
upgradeneeded
event, fired when a database of a bigger version number than the existing stored database is loaded.
Derived interface
No derived interface
Example
var db; // Let us open 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 below db = request.result; // Run the displayData() function to populate the task list with all the to-do list data already in the IDB displayData(); }; // This event handles the event whereby a new version of the database needs to be created // Either one has not been created before, or a new version number has been submitted via the // window.indexedDB.open line above //it is only implemented in recent browsers request.onupgradeneeded = function(event) { var db = event.target.result; db.onerror = function(event) { note.innerHTML += '<li>Error loading database.</li>'; }; // Create an objectStore for this database var objectStore = db.createObjectStore("toDoList", { keyPath: "taskTitle" }); };
Specifications
Specification | Status | Comment |
---|---|---|
{{SpecName('IndexedDB', '#idl-def-IDBOpenDBRequest', 'IDBOpenDBRequest')}} | {{Spec2('IndexedDB')}} |
Browser compatibility
{{ CompatibilityTable() }}
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support |
16{{property_prefix("webkit")}} 24 |
{{CompatGeckoDesktop("11.0")}}{{property_prefix("moz")}} {{CompatGeckoDesktop("16.0")}} |
10 | 17 | {{CompatNo}} |
Feature | Android | Chrome Mobile | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|---|
Basic support | 4.4 | Yes{{property_prefix("webkit")}} | {{CompatGeckoMobile("6.0")}} | 1.0.1 | 10 | 17 | {{CompatNo}} |
See also
- Using IndexedDB
- The reference application for the examples in this reference: To-do Notifications (view example live.) Not every snippet appears in this example, but every example uses the same data structure and syntax, and they will make sense in the context of this example.