The getAll() method of the IDBObjectStore interface returns an IDBRequest object containing all objects in the object store matching the specified parameter or all objects in the store if no parameters are given.

If a value is successfully found, then a structured clone of it is created and set as the result of the request object.

This method produces the same result for:

• a record that doesn't exist in the database
• a record that has an undefined value

To tell these situations apart, you either call

1. the openCursor() method with the same key. That method provides a cursor if the record exists, and no cursor if it does not.
2. the count() method with the same key, which will return 1 if the row exists and 0 if it doesn't.

query Optional

A key or IDBKeyRange to be queried. If nothing is passed, this will default to a key range that selects all the records in this object store.

count Optional

Specifies the number of values to return if more than one is found. If it is lower than 0 or greater than 2^32 - 1 a TypeError exception will be thrown.

An IDBRequest object on which subsequent events related to this operation are fired.

If the operation is successful, the value of the request's result property is an Array of the values of all records matching the given query, up to the value of count, if count was supplied.

This method may raise a DOMException of one of the following types:

TransactionInactiveError DOMException

Thrown if this IDBObjectStore's transaction is inactive.

DataError DOMException

Thrown if key or key range provided contains an invalid key or is null.

InvalidStateError DOMException

Thrown if the IDBObjectStore has been deleted or removed.

TypeError

Thrown if the count parameter is not between 0 and 2^32 - 1 included.

• 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).