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.
One of the following strings:
pending
-
Returned if the request is still ongoing.
done
-
Returned if the request has already completed.
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 the example live).
const title = "Walk dog";
const objectStore = db
.transaction(["toDoList"], "readwrite")
.objectStore("toDoList");
const objectStoreTitleRequest = objectStore.get(title);
objectStoreTitleRequest.onsuccess = () => {
const data = objectStoreTitleRequest.result;
data.notified = "yes";
const updateTitleRequest = objectStore.put(data);
console.log(
`The readyState of this request is ${updateTitleRequest.readyState}`,
);
updateTitleRequest.onsuccess = () => {
displayData();
};
};