<ul>
  <li>list item 1</li>
  <li>list item 2</li>
  <li>list item 3</li>
  <li>list item 4</li>
  <li>list item 5</li>
</ul>

{
  const ex1 = $('li').slice(2)
  const ex2 = $('li').slice(2, 4)
  const ex3 = $('li').slice(-2, -1)
  
  console.log(ex1)
  console.log(ex2)
  console.log(ex3)
}

{
  const ex1 = Array.from(document.querySelectorAll('li')).slice(2)
  const ex2 = Array.from(document.querySelectorAll('li')).slice(2, 4)
  const ex3 = Array.from(document.querySelectorAll('li')).slice(-2, -1)
  
  console.log(ex1)
  console.log(ex2)
  console.log(ex3)
}