The IDBCursorWithValue
interface of the IndexedDB API represents a cursor for traversing or iterating over multiple records in a database. It is the same as the IDBCursor
, except that it includes the value
property.
The cursor has a source that indicates which index or object store it is iterating over. 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.
You can have an unlimited number of cursors at the same time. You always get the same IDBCursorWithValue
object representing a given cursor. Operations are performed on the underlying index or object store.
Note: This feature is available in Web Workers.
<div id="interfaceDiagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 11.666666666666666%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 70" preserveAspectRatio="xMinYMin meet"><a xlink:href="https://developer.mozilla.org/en-US/docs/Web/API/IDBCursor" target="_top"><rect x="1" y="1" width="90" height="50" fill="#fff" stroke="#D4DDE4" stroke-width="2px" /><text x="46" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">IDBCursor</text></a><polyline points="91,25 101,20 101,30 91,25" stroke="#D4DDE4" fill="none"/><line x1="101" y1="25" x2="131" y2="25" stroke="#D4DDE4"/><a xlink:href="https://developer.mozilla.org/en-US/docs/Web/API/IDBCursorWithValue" target="_top"><rect x="131" y="1" width="180" height="50" fill="#F4F7F8" stroke="#D4DDE4" stroke-width="2px" /><text x="221" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">IDBCursorWithValue</text></a></svg></div>
a:hover text { fill: #0095DD; pointer-events: all;}
Methods
Inherits methods from its parent interface, IDBCursor
.
Properties
Inherits properties from its parent interface, IDBCursor
.
IDBCursorWithValue.value
Read only- Returns the value of the current cursor.
Example
In this example 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/IDBcursor-example/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 'IDBCursorWithValue' in that specification. | Recommendation | |
Indexed Database API DraftThe definition of 'IDBCursorWithValue' in that specification. | Recommendation |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
IDBCursorWithValue
|
Chrome Full support 24 Full support 24 No support 23 — 57 Prefixed' Implemented with the vendor prefix: webkit |
Edge
Full support 12 |
Firefox Full support 16 Full support 16 No support 10 — 16 Prefixed' Implemented with the vendor prefix: moz |
IE
Partial support 10 |
Opera
Full support 15 |
Safari
Full support 7 |
WebView Android Full support Yes Full support Yes No support ? — 57 Prefixed' Implemented with the vendor prefix: webkit |
Chrome Android Full support 25 Full support 25 No support 25 — 57 Prefixed' Implemented with the vendor prefix: webkit |
Firefox Android
Full support 22 |
Opera Android
Full support 14 |
Safari iOS
Full support 8 |
Samsung Internet Android Full support 1.5 Full support 1.5 No support 1.5 — 7.0 Prefixed' Implemented with the vendor prefix: webkit |
value
|
Chrome Full support 24 Full support 24 No support 23 — 24 Prefixed' Implemented with the vendor prefix: webkit |
Edge
Full support 12 |
Firefox Full support 16 Full support 16 No support 10 — 16 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 |
Available in workers | Chrome
Full support Yes |
Edge
Full support ≤18 |
Firefox
Full support 42 |
IE
? |
Opera
Full support Yes |
Safari
? |
WebView Android
Full support Yes |
Chrome Android
Full support Yes |
Firefox Android
Full support 42 |
Opera Android
Full support Yes |
Safari iOS
? |
Samsung Internet Android
Full support Yes |
Legend
- Full support
- Full support
- Partial support
- Partial support
- Compatibility unknown
- Compatibility unknown
- Requires a vendor prefix or different name for use.'
- Requires a vendor prefix or different name for use.
See also
- 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 ([[../../../../../../mdn.github.io/to-do-notifications/index|view example live]].)
IDBCursorWithValue by Mozilla Contributors is licensed under CC-BY-SA 2.5.