Insert the HTML in the list
 
          pentingnya: 5 
         
 
        Write the code to insert <li>2</li><li>3</li> between two <li> here:
<ul id="ul">
  <li id="one">1</li>
  <li id="two">4</li>
</ul>When we need to insert a piece of HTML somewhere, insertAdjacentHTML is the best fit.
The solution:
one.insertAdjacentHTML('afterend', '<li>2</li><li>3</li>');