IDBDatabase.onerror
The onerror
event handler of the
IDBDatabase
interface handles the error event, fired when a request
returns an error and bubbles up to the connection object.
Note: Consider using IDBOpenDBRequest.onsuccess
instead
(see IDBRequest.onsuccess
, where it is inherited from).
Note: This feature is available in Web Workers.
Syntax
IDBDatabase.onerror = function(event) { ... }
Example
This example shows an IDBOpenDBRequest.onupgradeneeded
block that
creates a new object store; it also includes onerror
and onabort
functions to handle non-success cases.
DBOpenRequest.onupgradeneeded = function(event) {
var db = this.result;
db.onerror = function(event) {
note.innerHTML += '<li>Error opening database.</li>';
};
db.onabort = function(event) {
note.innerHTML += '<li>Database opening aborted!</li>';
};
// Create an objectStore for this database
var objectStore = db.createObjectStore("toDoList", { keyPath: "taskTitle" });
// define what data items the objectStore will contain
objectStore.createIndex("hours", "hours", { unique: false });
objectStore.createIndex("minutes", "minutes", { unique: false });
objectStore.createIndex("day", "day", { unique: false });
objectStore.createIndex("month", "month", { unique: false });
objectStore.createIndex("year", "year", { unique: false });
objectStore.createIndex("notified", "notified", { unique: false });
note.innerHTML += '<li>Object store created.</li>';
};
Specifications
Specification | Status | Comment |
---|---|---|
Indexed Database API 2.0 The definition of 'onerror' in that specification. |
Recommendation | |
Indexed Database API 2.0 The definition of 'onerror' in that specification. |
Recommendation |
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 example live.)
error
event