IDBVersionChangeEvent: newVersion property
Note: This feature is available in Web Workers.
The newVersion
read-only property of the
IDBVersionChangeEvent
interface returns the new version number of the
database.
Value
A number that is a 64-bit integer or null if the database is being deleted.
Examples
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).
js
const note = document.querySelector("ul");
// Let us open version 4 of our database
const DBOpenRequest = window.indexedDB.open("toDoList", 4);
// these two event handlers act on the database being opened
DBOpenRequest.onerror = (event) => {
note.appendChild(document.createElement("li")).textContent =
"Error loading database.";
};
DBOpenRequest.onsuccess = (event) => {
note.appendChild(document.createElement("li")).textContent =
"Database initialized.";
// store the result of opening the database in the db variable.
// This is used a lot later on, for opening transactions and suchlike.
const db = DBOpenRequest.result;
};
Specifications
Specification |
---|
Indexed Database API 3.0 # dom-idbversionchangeevent-newversion |
Browser compatibility
BCD tables only load in the browser
See also
- Using IndexedDB
- Starting transactions:
IDBDatabase
- Using transactions:
IDBTransaction
- Setting a range of keys:
IDBKeyRange
- Retrieving and making changes to your data:
IDBObjectStore
- Using cursors:
IDBCursor
- Reference example: To-do Notifications (View the example live).