Web/API/IDBCursor/continue

The continue() method of the IDBCursor interface advances the cursor to the next position along its direction, to the item whose key matches the optional key parameter. If no key is specified, the cursor advances to the immediate next position, based on its direction.

Note: This feature is available in Web Workers.

Syntax

cursor.continue(key);

Parameters

key Optional: The key to position the cursor at.

Exceptions

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

Exception Description

TransactionInactiveError This IDBCursor's transaction is inactive.

DataError

The key parameter may have any of the following conditions:

The key is not a valid key.
The key is less than or equal to this cursor's position and the cursor's direction is next or nextunique.
The key is greater than or equal to this cursor's position and this cursor's direction is prev or prevunique.

InvalidStateError The cursor is currently being iterated or has iterated past its end.

Example

In this simple fragment we create a transaction, retrieve an object store, then use a cursor to iterate through all the records in the object store. The cursor does not require us to select the data based on a key; we can just grab all of it. Also note that in each iteration of the loop, you can grab data from the current record under the cursor object using cursor.value.foo. For a complete working example, see our IDBCursor example ([[../../../../../../../mdn.github.io/indexeddb-examples/idbcursor/index|view example live]].)

function displayData() {
  var transaction = db.transaction(['rushAlbumList'], "readonly");
  var objectStore = transaction.objectStore('rushAlbumList');

  objectStore.openCursor().onsuccess = function(event) {
    var cursor = event.target.result;
    if(cursor) {
      var listItem = document.createElement('li');
      listItem.innerHTML = cursor.value.albumTitle + ', ' + cursor.value.year;
      list.appendChild(listItem);  

      cursor.continue();
    } else {
      console.log('Entries all displayed.');
    }
  };
};

Specifications

Specification	Status	Comment
Indexed Database API 2.0The definition of 'continue()' in that specification.	Recommendation
Indexed Database API DraftThe definition of 'continue()' in that specification.	Recommendation

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`continue`	Chrome Full support 24 Full support 24 No support 23 — 24 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support 12	Firefox Full support 16 Full support 16 No support 10 — 16 Prefixed' Prefixed' Implemented with the vendor prefix: moz	IE Partial support 10	Opera Full support 15	Safari Full support 7	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 22	Opera Android Full support 14	Safari iOS Full support 8	Samsung Internet Android Full support Yes

Legend

Full support: Full support
Partial support: Partial support
Requires a vendor prefix or different name for use.': Requires a vendor prefix or different name for use.