The put()
method of the IDBObjectStore
interface updates a given record in a database, or inserts a new record if the given item does not already exist.
It returns an IDBRequest
object, and, in a separate thread, creates a structured clone of the value and stores the cloned value in the object store. This is for adding new records, or updating existing records in an object store when the transaction's mode is readwrite
. If the record is successfully stored, then a success event is fired on the returned request object with the result
set to the key for the stored record, and the transaction
set to the transaction in which this object store is opened.
The put method is an update or insert method. See the IDBObjectStore.add
method for an insert only method.
Bear in mind that if you have a IDBCursor
to the record you want to update, updating it with IDBCursor.update()
is preferable to using IDBObjectStore.put()
. Doing so makes it clear that an existing record will be updated, instead of a new record being inserted.
Note: This feature is available in Web Workers.
Syntax
let request = objectStore.put(item); let request = objectStore.put(item, key);
Parameters
- item
- The item you wish to update (or insert).
- key Optional
- The primary key of the record you want to update (e.g. from
IDBCursor.primaryKey
). This is only needed for object stores that have anautoIncrement
primary key, therefore the key is not in a field on the record object. In such cases, callingput(item)
will always insert a new record, because it doesn't know what existing record you might want to modify.
Return value
An IDBRequest
object on which subsequent events related to this operation are fired.
Exceptions
This method may raise a DOMException
of one of the following types:
Exception | Description |
---|---|
ReadOnlyError
|
The transaction associated with this operation is in read-only mode. |
TransactionInactiveError
|
This IDBObjectStore 's transaction is inactive.
|
DataError
|
Any of the following conditions apply:
|
InvalidStateError
|
The IDBObjectStore has been deleted or removed.
|
DataCloneError
|
The data being stored could not be cloned by the internal structured cloning algorithm.
|
Parameters
- value
- The value to be stored.
- key
- The key to use to identify the record. If unspecified, it results to null. If the object store has a key generator (e.g. autoincrement) the key of the object must be passed in to update the object.
Example
The following example requests a given record title; when that request is successful the onsuccess
function gets the associated record from the IDBObjectStore
(made available as objectStoreTitleRequest.result
), updates one property of the record, and then puts the updated record back into the object store in another request with put()
. For a full working example, see our To-do Notifications app ([[../../../../../../../mdn.github.io/to-do-notifications/index|view example live]].)
const title = "Walk dog";
// Open up a transaction as usual
const objectStore = db.transaction(['toDoList'], "readwrite").objectStore('toDoList');
// Get the to-do list object that has this title as it's title
const objectStoreTitleRequest = objectStore.get(title);
objectStoreTitleRequest.onsuccess = () => {
// Grab the data object returned as the result
const data = objectStoreTitleRequest.result;
// Update the notified value in the object to "yes"
data.notified = "yes";
// Create another request that inserts the item back into the database
const updateTitleRequest = objectStore.put(data);
// Log the transaction that originated this request
console.log("The transaction that originated this request is " + updateTitleRequest.transaction);
// When this new request succeeds, run the displayData() function again to update the display
updateTitleRequest.onsuccess = () => {
displayData();
};
};
Specification
Specification | Status | Comment |
Indexed Database API 2.0The definition of 'put()' in that specification. | Recommendation | |
Indexed Database API DraftThe definition of 'put()' 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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
put
|
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 |
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.
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]].)
IDBObjectStore.put() by Mozilla Contributors is licensed under CC-BY-SA 2.5.