title: How to fix an escaped JSON string (JavaScript)
body: <p>A remote server (out of my control) send a JSON string which has all fieldnames and values escaped.
  For example, when I do JSON.stringify(res), this is the result:</p>
  
  <pre><code>"{\"orderId\":\"123\"}"
  </code></pre>
  
  <p>Now when I do alert(res.orderId), it says undefined. I think it's because of the escaped "s.
  How do I fix this?</p>