title: When appending childnode, its throwing error "Property 'appendChild' does not exist on type 'NodeListOf<Element>'."
body: <p>when appending child node to <em>li</em> , getting error like <em>Property 'appendChild' does not exist on type 'NodeListOf'</em></p>
  
  <pre><code>let li: NodeListOf&lt;Element&gt; = document.querySelectorAll("name li");  
  
          var newItem = document.createElement("li");
          var ListValue = document.createTextNode("abcd");
          var ListValue = document.createTextNode("efgh");
          var ListValue = document.createTextNode("ijkl");
  
  
          newItem.appendChild(ListValue);
          li.appendChild(ListItem);
  </code></pre>