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JavaScript JavaScript and the DOM (Retiring) Traversing the DOM Using parentNode to Traverse Up the DOM

Posted by Karl Russell Sumando Menil
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Karl Russell Sumando Menil
Full Stack JavaScript Techdegree Student 4,004 Points

cannot add item

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 addItemButtom = document.querySelector('button.addItemButtom');

listUl.addEventListener('click', (event) => { if(event.target.tagName == 'BUTTON') { let li = event.target.parentNode; let ul = li.parentNode; ul.removeChild(li); } });

toggleList.addEventListener('click', () => { if (listDiv.style.display == 'none') { toggleList.textContent = 'Hide list'; 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; ul.appendChild(li); addItemInput.value = ''; });

1 Answer

Peter Vann
Peter Vann
36,425 Points

Hi Karl!

This works just fine:

<!DOCTYPE html>
<html>
<body>

<h2>Append Child</h2>

<ul id="myList">
  <li>One</li>
  <li>Two</li>
</ul>

<script>
let myList = document.getElementById("myList");
let li = document.createElement('li');
li.textContent = "Three";
myList.addEventListener('click', () => {
    myList.appendChild(li);
});
</script>

</body>
</html>

Go here:

https://www.w3schools.com/js/tryit.asp?filename=tryjs_array

And paste/replace the code in the left pane, run it and click the list (in the right pane)...

Three should become the third list item.

That should get you further along...

I hope that helps.

Stay safe and happy coding!