title: Do the JSON keys have to be surrounded by quotes?
body: <p>Example:
  Is the following code valid against the <a href="https://www.rfc-editor.org/rfc/rfc4627" rel="noreferrer">JSON Spec</a>?</p>
  <pre><code>{
      precision: &quot;zip&quot;
  }
  </code></pre>
  <p>Or should I always use the following syntax? (And if so, why?)</p>
  <pre><code>{
      &quot;precision&quot;: &quot;zip&quot;
  }
  </code></pre>
  <p>I haven't really found something about this in the JSON specifications. Although they use quotes around their keys in their examples.</p>