To insert HTML elements with JavaScript, we call the insertAdjancentHTML method.
For instance, we write
const element = document.getElementById("one");
const newElement = '<div id="two">two</div>';
element.insertAdjacentHTML("afterend", newElement);
to call getElementById to get the element.
Then we call insertAdjacentHTML to insert the element in the newElement string as the element after element with 'afterend'.
