title: Using the xpathResult of the document.evaluate() as a contextNode does not work
body: <p>While using document.evaluate I try to use xpathResult again as a contextNode similar to the example attached and without success, where was I wrong?</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>const getAllLiButton = document.querySelector("#get-all-li");
  const getTitleAndTextButton = document.querySelector("#get-title-text");
  
  getAllLiButton.addEventListener("click", getAllLi);
  getTitleAndTextButton.addEventListener("click", getTitleAndText);
  
  function getAllLi() {
    var records = [];
  
    let topLevelResults = document.evaluate("/html/body/ul/li", document, null, XPathResult.ORDERED_NODE_ITERATOR_TYPE, null);
  
    var levelResult = topLevelResults.iterateNext();
    while (levelResult) {
      records.push(levelResult);
      
      levelResult = topLevelResults.iterateNext();
    }
  
    console.log(records);
  }
  
  function getTitleAndText() {
    let topLevelResults = document.evaluate("/html/body/ul/li", document, null, XPathResult.ORDERED_NODE_ITERATOR_TYPE, null);
  
    var levelResult = topLevelResults.iterateNext();
  
    let titleText = document.evaluate("/h3", levelResult, null, XPathResult.ORDERED_NODE_ITERATOR_TYPE, null);
    console.log(titleText);
  
    let textBox = document.evaluate("/span", levelResult, null, XPathResult.ORDERED_NODE_ITERATOR_TYPE, null);
    console.log(textBox);
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;button id="get-all-li"&gt;Get all li (works)&lt;/button&gt;
  &lt;button id="get-title-text"&gt;Get single Title &amp; Text (not works)&lt;/button&gt;
  
  &lt;ul&gt;
    &lt;li&gt;&lt;h3&gt;Title #1&lt;/h3&gt;&lt;span&gt;some text&lt;/span&gt;&lt;/li&gt;
    &lt;li&gt;&lt;h3&gt;Title #2&lt;/h3&gt;&lt;span&gt;some text&lt;/span&gt;&lt;/li&gt;
    &lt;li&gt;&lt;h3&gt;Title #3&lt;/h3&gt;&lt;span&gt;some text&lt;/span&gt;&lt;/li&gt;
    &lt;li&gt;&lt;h3&gt;Title #4&lt;/h3&gt;&lt;span&gt;some text&lt;/span&gt;&lt;/li&gt;
    &lt;li&gt;&lt;h3&gt;Title #5&lt;/h3&gt;&lt;span&gt;some text&lt;/span&gt;&lt;/li&gt;
  &lt;/ul&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>Thanks in advance for your help!</p>