openKeyCursor method

IDBRequest openKeyCursor([
  1. JSAny? query,
  2. IDBCursorDirection direction
])

The openKeyCursor() method of the IDBIndex interface returns an IDBRequest object, and, in a separate thread, creates a cursor over the specified key range, as arranged by this index.

The method sets the position of the cursor to the appropriate key, based on the specified direction.

If the key range is not specified or is null, then the range includes all the keys.

Note: Cursors returned by openKeyCursor() do not make the referenced value available as IDBIndex.openCursor does. This makes obtaining a list of keys much more efficient.

Implementation

external IDBRequest openKeyCursor([
  JSAny? query,
  IDBCursorDirection direction,
]);