The readyState
read-only property of the IDBRequest
interface returns the state of the request.
>Every request starts in the pending
state. The state changes to done
when the request completes successfully or when an error occurs.
The IDBRequestReadyState
of the request, which takes one of the following two values:
The following example requests a given record title, onsuccess
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. The readyState
of the 2nd request is logged to the developer console. For a full working example, see our To-do Notifications app (view example live.)
var title = "Walk dog";
var objectStore = db.transaction(['toDoList'], "readwrite").objectStore('toDoList');
var objectStoreTitleRequest = objectStore.get(title);
objectStoreTitleRequest.onsuccess = function() {
var data = objectStoreTitleRequest.result;
data.notified = "yes";
var updateTitleRequest = objectStore.put(data);
console.log("The readyState of this request is " + updateTitleRequest.readyState);
updateTitleRequest.onsuccess = function() {
displayData();
};
};