How does global error handling work in service workers? : <p>I found <a href="https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer/onerror" rel="noreferrer">https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer/onerror</a> which says:</p>

<blockquote>
  <p>The onerror property of the ServiceWorkerContainer interface is an
  event handler fired whenever an error event occurs in the associated
  service workers.</p>
</blockquote>

<p>However I'm not able to get this working in Chrome (v51). In the scope of the main application, I ran the following code from the console:</p>

<pre><code>navigator.serviceWorker.onerror = function(e) { console.log('some identifiable string' + e); };
</code></pre>

<p>Then within the scope of the active service worker I triggered an arbitrary error:</p>

<pre><code>f(); // f is undefined
</code></pre>

<p>The result was the usual "Uncaught ReferenceError: f is not defined(…)" error message but it was not logged through my global onerror handler.</p>

<p>The MDN page says that this API has been supported in Chrome since v40, but <code>navigator.serviceWorker.onerror</code> is initially undefined which leads me to believe that it's unimplemented. Is anyone familiar with this?</p>
