What does { content: [Circular] } mean in JavaScript?
<p>My code was:</p>

<pre><code>var chineseBox = {};
chineseBox.content = chineseBox;
</code></pre>

<p>and it returned:</p>

<pre><code>{ content: [Circular] }
</code></pre>

<p>What does that mean?</p>
