<ul id="fruits">
  <li> Apples </li>
  <li> Raisins</li>
  <li> Oranges</li>
  <li>Dates  </li>
  <li>Pears </li>
  <li>Apricots </li>
</ul>

let newElement = document.createElement('li');

let newFruit = document.createTextNode('Banana');

newElement.appendChild(newFruit);

let fruits = document.getElementById('fruits');

fruits.appendChild(newElement);