title: Element.querySelector is undefined
body: <p>Why does this code throw an error in the console reading <code>TypeError: pizzaBox.querySelector is not a function. (In 'pizzaBox.querySelector('h6')', 'pizzaBox.querySelector' is undefined)</code>?</p>
  
  <pre><code>function addToppingsToAll (toppings)
  {
      var pizzaBoxHolder = document.getElementById("PizzaBoxHolder");
      var PizzaBoxList   = pizzaBoxHolder.childNodes;
      for ( var i = 0 ; i &lt; pizzaBoxList.length ; i++ )
      {
          var pizzaBox            = pizzaBoxList[i];
          toppingList             = pizzaBox.querySelector('h6');
          toppingList.textContent = "You have " + toppings " on your pizza";
      }
  }
  </code></pre>