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");
};
const 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");
};
const 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();
};