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JavaScript JavaScript and the DOM (Retiring) Traversing the DOM Getting All Children of a Node with children

What is wrong with my code please help

<!DOCTYPE html> <html> <head> <title>JavaScript and the DOM</title> <link rel="stylesheet" href="css/style.css"> </head> <body> <h1 id="myHeading">JavaScript and the DOM</h1> <p>Making a web page interactive</p> <button id="toggleList">Hide list</button> <div class="list"> <p class="description">Things that are purple:</p> <input type="text" class="description"> <button class="description">Change list description</button>

  <input type="text" class="addItemInput">
  <button class="addItemButton">Add item</button>
<script src="app.js"></script>

</body> </html>

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 = document.querySelector('ul'); const addItemInput = document.querySelector('input.addItemInput'); const addItemButton = document.querySelector('button.addItemButton'); const listItems = document.getElementsByTagName('li'); const lis = listUl.children;

function attachListItemButtons(li) { let up = document.createElement('button'); up.className = 'up'; up.textContent = 'Up'; li.appendChild(up);

let down = document.createElement('button'); down.className = 'down'; down.textContent = 'Down'; li.appendChild(down);

let remove = document.createElement('button'); remove.className = 'remove'; remove.textContent = 'Remove'; li.appendChild(remove);


for(let i = 0; i < lis.length; i += 1) { attachListItemButtons(lis[i]); }

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

toggleList.addEventListener('click', () => { if (listDiv.style.display == 'none') { toggleList.textContent = 'Hide text' listDiv.style.display = 'block'; } else { toggleList.textContent = 'Show list'; listDiv.style.display = 'none';
} });

descriptionButton.addEventListener('click', () => { descriptionP.innerHTML = descriptionInput.value + ':'; descriptionInput.value = '';

addItemButton.addEventListener('click', () => { let ul = document.getElementsByTagName('ul')[0];
let li = document.createElement('li'); li.textContent = addItemInput.value; attachListItemButtons(li); ul.appendChild(li); addItemInput.value = ''; });

1 Answer

Steven Parker
Steven Parker
217,573 Points

For future postings, please use Markdown formatting to preserve the appearance of the code, or share the entire workspace by making a snapshot and posting the link to it.

But it appears that your issues are just spelling issues. JavaScript is case-sensitive, so "li" (lower case) is not the same thing as "Li" (capital "L") as it is written in a couple of places. Also, there are multiple misspellings of the argument "event" (singular) as "events" (plural).