The blocked handler is executed when an open connection to a database is blocking a versionchange transaction on the same database.
General info
- Specification
- IndexedDB
- Interface
- IDBVersionChangeEvent
- Bubbles
- No
- Cancelable
- No
- Target
- IDBRequest
- Default Action
- None
Properties
| Property | Type | Description |
|---|---|---|
target Read only |
EventTarget |
The request concerned by this event |
type Read only |
DOMString |
The type of event. |
bubbles Read only |
Boolean |
Whether the event normally bubbles or not |
cancelable Read only |
Boolean |
Whether the event is cancellable or not? |
newVersion Read only |
unsigned long (int) | The new version of the database. |
oldVersion Read only |
unsigned long (int) | The old version of the database. |
Example
var req1 = indexedDB.open("addressbook", 3);
req1.onsuccess = function( event ) {
var addressbookDB = event.target.result;
// Let's try to open the same database with a higher revision version
var req2 = indexedDB.open("addressbook", 4);
// In this case the onblocked handler will be executed
req2.onblocked = function( e ) {
console.log(e)
};
};