IDBCursor.request - Web APIs 编辑

The request read-only property of the IDBCursor interface returns the IDBRequest used to obtain the cursor.

Note:

Syntax

IDBCursor.request;

Value

An IDBRequest object instance.

Examples

When you open a cursor, the request property is then available on that cursor object, to tell you what request object the cursor originated from. For example:

function displayData() {
  list.textContent = '';
  const transaction = db.transaction(['rushAlbumList'], 'readonly');
  const objectStore = transaction.objectStore('rushAlbumList');

  const request = objectStore.openCursor();

  request.onsuccess = function(event) {
    const cursor = event.target.result;
      if(cursor) {
        const listItem = document.createElement('li');
        listItem.innerHTML = '<strong>' + cursor.value.albumTitle + '</strong>, ' + cursor.value.year;
        list.appendChild(listItem);
        console.log(cursor.request);
        cursor.continue();
      } else {
        console.log('Entries all displayed.');
      }
  };
};

Specifications

Browser compatibility

BCD tables only load in the browser

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.

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 (view example live.)