Why does JSON.stringify only show the isTrusted member of a click event?
<p>HTML:</p>

<pre><code>&lt;button onclick="foo(event);"&gt;Test&lt;/button&gt;
</code></pre>

<p>Javascript:</p>

<pre><code>window.foo = function(event) {
  console.log(JSON.stringify(event));
}
</code></pre>

<p>Console Result:</p>

<pre><code>{"isTrusted":true}
</code></pre>

<p>It is happening on Chrome.  I haven't tested other browsers yet.</p>