IDBObjectStore: indexNames property

The indexNames read-only property of the IDBObjectStore interface returns a list of the names of indexes on objects in this object store.

Note: This feature is available in Web Workers

Value

Examples

In the following code snippet, we open a read/write transaction on our database and add some data to an object store using add(). After the object store has been created, we log objectStore.indexNames to the console. For a full working example, see our To-do Notifications app (view example live).

js
// Let us open our database
const DBOpenRequest = window.indexedDB.open("toDoList", 4);

DBOpenRequest.onsuccess = (event) => {
  note.innerHTML += "<li>Database initialized.</li>";

  // store the result of opening the database in the db variable.
  // This is used a lot below
  db = this.result;

  // Run the addData() function to add the data to the database
  addData();
};

function addData() {
  // Create a new object ready to insert into the IDB
  const newItem = [
    {
      taskTitle: "Walk dog",
      hours: 19,
      minutes: 30,
      day: 24,
      month: "December",
      year: 2013,
      notified: "no",
    },
  ];

  // open a read/write db transaction, ready for adding the data
  const transaction = db.transaction(["toDoList"], "readwrite");

  // report on the success of the transaction completing, when everything is done
  transaction.oncomplete = (event) => {
    note.innerHTML += "<li>Transaction completed.</li>";
  };

  transaction.onerror = (event) => {
    note.innerHTML +=
      "<li>Transaction not opened due to error. Duplicate items not allowed.</li>";
  };

  // create an object store on the transaction
  const objectStore = transaction.objectStore("toDoList");
  console.log(objectStore.indexNames);

  // Make a request to add our newItem object to the object store
  const objectStoreRequest = objectStore.add(newItem[0]);

  objectStoreRequest.onsuccess = (event) => {
    // report the success of our request
    note.innerHTML += "<li>Request successful.</li>";
  };
}

Specifications

Specification
Indexed Database API 3.0
# ref-for-dom-idbobjectstore-indexnames①

Browser compatibility

BCD tables only load in the browser

See also