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+---
+title: 'IDBTransaction: complete event'
+slug: Web/API/IDBTransaction/complete_event
+translation_of: Web/API/IDBTransaction/complete_event
+---
+<div>{{APIRef("IndexedDB")}}</div>
+
+<p>The <code>complete</code> handler is executed when a transaction successfully completed.</p>
+
+<table class="properties">
+ <tbody>
+  <tr>
+   <th scope="row">Bubbles</th>
+   <td>No</td>
+  </tr>
+  <tr>
+   <th scope="row">Cancelable</th>
+   <td>No</td>
+  </tr>
+  <tr>
+   <th scope="row">Interface</th>
+   <td>{{DOMxRef("Event")}}</td>
+  </tr>
+  <tr>
+   <th scope="row">Event handler property</th>
+   <td>{{DOMxRef("IDBTransaction.oncomplete", "oncomplete")}}</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Examples">Examples</h2>
+
+<p>Using {{DOMxRef("EventTarget.addEventListener", "addEventListener()")}}:</p>
+
+<pre class="brush: js;">// Open the database
+const DBOpenRequest = window.indexedDB.open('toDoList', 4);
+
+DBOpenRequest.onupgradeneeded = event =&gt; {
+  const db = event.target.result;
+
+  db.onerror = () =&gt; {
+    console.log('Error creating database');
+  };
+
+  // Create an objectStore for this database
+  var objectStore = db.createObjectStore('toDoList', { keyPath: 'taskTitle' });
+
+  // define what data items the objectStore will contain
+  objectStore.createIndex('hours', 'hours', { unique: false });
+  objectStore.createIndex('minutes', 'minutes', { unique: false });
+  objectStore.createIndex('day', 'day', { unique: false });
+  objectStore.createIndex('month', 'month', { unique: false });
+  objectStore.createIndex('year', 'year', { unique: false });
+};
+
+DBOpenRequest.onsuccess = event =&gt; {
+  const db = DBOpenRequest.result;
+
+  // open a read/write db transaction, ready for adding the data
+  const transaction = db.transaction(['toDoList'], 'readwrite');
+
+  // add a listener for `complete`
+  transaction.addEventListener('complete', event =&gt; {
+    console.log('Transaction was competed');
+  });
+
+  const objectStore = transaction.objectStore('toDoList');
+  const newItem = { taskTitle: 'my task', hours: 10, minutes: 10, day: 10, month: 'January', year: 2019 };
+  const objectStoreRequest = objectStore.add(newItem);
+};
+
+</pre>
+
+<p>Using the {{DOMxRef("IDBTransaction.oncomplete", "oncomplete")}} property:</p>
+
+<pre class="brush: js;">// Open the database
+const DBOpenRequest = window.indexedDB.open('toDoList', 4);
+
+DBOpenRequest.onupgradeneeded = event =&gt; {
+  const db = event.target.result;
+
+  db.onerror = () =&gt; {
+    console.log('Error creating database');
+  };
+
+  // Create an objectStore for this database
+  var objectStore = db.createObjectStore('toDoList', { keyPath: 'taskTitle' });
+
+  // define what data items the objectStore will contain
+  objectStore.createIndex('hours', 'hours', { unique: false });
+  objectStore.createIndex('minutes', 'minutes', { unique: false });
+  objectStore.createIndex('day', 'day', { unique: false });
+  objectStore.createIndex('month', 'month', { unique: false });
+  objectStore.createIndex('year', 'year', { unique: false });
+};
+
+DBOpenRequest.onsuccess = event =&gt; {
+  const db = DBOpenRequest.result;
+
+  // open a read/write db transaction, ready for adding the data
+  const transaction = db.transaction(['toDoList'], 'readwrite');
+
+  // add a listener for `complete`
+  transaction.oncomplete = event =&gt; {
+    console.log('Transaction was competed');
+  };
+
+  const objectStore = transaction.objectStore('toDoList');
+  const newItem = { taskTitle: 'my task', hours: 10, minutes: 10, day: 10, month: 'January', year: 2019 };
+  const objectStoreRequest = objectStore.add(newItem);
+};</pre>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+
+
+<p>{{Compat("api.IDBTransaction.complete_event")}}</p>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="/en-US/docs/IndexedDB/Using_IndexedDB">Using IndexedDB</a></li>
+ <li>{{DOMxRef("IDBTransaction.oncomplete", "oncomplete")}} event handler property</li>
+</ul>