IDBDatabase: version property

Note: This feature is available in Web Workers.

The version property of the IDBDatabase interface is a 64-bit integer that contains the version of the connected database. When a database is first created, this attribute is an empty string.


An integer containing the version of the connected database.


// Let us open our database
const DBOpenRequest ="toDoList", 4);

// these two event handlers act on the database
// being opened successfully, or not
DBOpenRequest.onerror = (event) => {
  note.innerHTML += "<li>Error loading database.</li>";

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 = DBOpenRequest.result;

  // This line will log the version of the connected database, which should be "4"


Indexed Database API 3.0
# ref-for-dom-idbdatabase-version①

Browser compatibility

BCD tables only load in the browser

See also