The abort event is fired when an IndexedDB transaction is aborted.
This can happen for any of the following reasons:
- Bad requests, (E.g., trying to add the same key twice, or put the same index key when the key has a uniqueness constraint).
- An explicit
abort() call.
- An uncaught exception in the request's success/error handler.
- An I/O error (an actual failure to write to disk, for example disk detached, or other OS/hardware failure).
- Quota exceeded.
This non-cancelable event bubbles to the associated IDBDatabase object.
Use the event name in methods like addEventListener(), or set an event handler property.
addEventListener('abort', event => { });
onabort = event => { };
This event bubbles to IDBDatabase. The event.target property refers to the IDBTransaction object that bubbles up.
For more information, see Event bubbling and capture.
This example opens a database (creating the database if it does not exist), then opens a transaction, adds a listener to the abort event, then aborts the transaction to trigger the event.
const DBOpenRequest = window.indexedDB.open('toDoList', 4);
DBOpenRequest.onupgradeneeded = event => {
const db = event.target.result;
db.onerror = () => {
console.log('Error creating database');
};
var objectStore = db.createObjectStore('toDoList', { keyPath: 'taskTitle' });
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 });
};
DBOpenRequest.onsuccess = event => {
const db = DBOpenRequest.result;
const transaction = db.transaction(['toDoList'], 'readwrite');
transaction.addEventListener('abort', () => {
console.log('Transaction was aborted');
});
transaction.abort();
};
The same example, but assigning the event handler to the onabort property:
const DBOpenRequest = window.indexedDB.open('toDoList', 4);
DBOpenRequest.onupgradeneeded = event => {
const db = event.target.result;
db.onerror = () => {
console.log('Error creating database');
};
var objectStore = db.createObjectStore('toDoList', { keyPath: 'taskTitle' });
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 });
};
DBOpenRequest.onsuccess = event => {
const db = DBOpenRequest.result;
const transaction = db.transaction(['toDoList'], 'readwrite');
transaction.onabort = (event) => {
console.log('Transaction was aborted');
};
transaction.abort();
};
