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JavaScript JavaScript and the DOM (Retiring) Traversing the DOM Challenge: Using nextElementSibling

Tom Manger
Tom Manger
2,917 Points
Posted by Tom Manger
Tom Manger
2,917 Points

What am I doing wrong? insertAfter()

https://w.trhou.se/hrqiv6fvlu

const toggleList = document.getElementById('toggleList');
const listDiv = document.querySelector('.list');
const descriptionInput = document.querySelector('input.description');
const descriptionP = document.querySelector('p.description');
const descriptionButton = document.querySelector('button.description');
const listUl = listDiv.querySelector('ul');
const addItemInput = document.querySelector('input.addItemInput');
const addItemButton = document.querySelector('button.addItemButton');

listUl.addEventListener('click', (event) => {
  if (event.target.tagName == 'BUTTON') {
    if(event.target.className == 'remove'){
      let li = event.target.parentNode;
      let ul = li.parentNode;
      ul.removeChild(li);
    }
    if(event.target.className == 'up'){
      let li = event.target.parentNode;
      let prevLi = li.previousElementSibling;
      let ul = li.parentNode;
      if(prevLi){
        ul.insertBefore(li, prevLi);
      }
    }
     if(event.target.className == 'down'){
      let li = event.target.parentNode;
      let nextLi = li.nextElementSibling;
      let ul = li.parentNode;
      if(nextLi){
        ul.insertAfter(li, nextLi);
      }
    }
  }
});
Michael Anel
Michael Anel
7,469 Points
Michael Anel
Michael Anel
7,469 Points

There is no Node.insertAfter() DOM function in Javascript. Only when using JQuery. So I believe the code should be written as..

  let li = event.target.parentNode;
  let nextLi = li.nextElementSibling;
  let ul = li.parentNode;
  ul.insertBefore(nextLi, li);

1 Answer

Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

As Michael pointed out, there's no "insertAfter" function. The functionality you want is available from the "insertAdjacentElement" function:

li.insertAdjacentElement("afterend", nextLi);

But using "insertBefore" with the arguments reversed is also a good choice.