The IDBCursor interface of the IndexedDB API represents a cursor for traversing or iterating over multiple records in a database.
The cursor has a source that indicates which index or object store it is iterating. It has a position within the range, and moves in a direction that is increasing or decreasing in the order of record keys. The cursor enables an application to asynchronously process all the records in the cursor's range.
The type of .source
This method may raise a DOMException of one of the following types:
This method may raise a DOMException of one of the following types:
Sets cursor to key if specified, otherwise advances cursor by one.
Sets cursor to key if specified, otherwise advances cursor by one.
calling this method twice from the same onsuccess handler results in a InvalidStateError DOMException being thrown on the second call W3C
Is a DOMString that, on getting, returns the direction of traversal of the cursor. See Constants for possible values.
Is a DOMString that, on getting, returns the direction of traversal of the cursor. See Constants for possible values.
Returns the key for the record at the cursor's position. If the cursor is outside its range, this is set to undefined. The cursor's key can be any data type.
Returns the key for the record at the cursor's position. If the cursor is outside its range, this is set to undefined. The cursor's key can be any data type.
Returns the cursor's current effective key. If the cursor is currently being iterated or has iterated outside its range, this is set to undefined. The cursor's primary key can be any data type.
Returns the cursor's current effective key. If the cursor is currently being iterated or has iterated outside its range, this is set to undefined. The cursor's primary key can be any data type.
On getting, this object returns the IDBObjectStore or IDBIndex that the cursor is iterating. This function never returns null or throws an exception, even if the cursor is currently being iterated, has iterated past its end, or its transaction is not active.
On getting, this object returns the IDBObjectStore or IDBIndex that the cursor is iterating. This function never returns null or throws an exception, even if the cursor is currently being iterated, has iterated past its end, or its transaction is not active.