Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript JavaScript and the DOM (Retiring) Making Changes to the DOM Appending Nodes

Why is the browswer not reading "addItemButton" correctly?

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 addItemInput = document.querySelector('input.addItemInput'); const addItemButton = document.querySelector('button.addItemButton');

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 = ''; //this resets the input area back to blank. });

1 Answer

Hi Matthew!

I haven't tested it but I think this will remedy it:

const addItemButton = document.querySelector('.addItemButton'); // just lose 'button', but keep the dot

It's the kind of thing I tend to figure out through repeated trial and error.

(Please) Let me know if that fixes it.

I hope that helps.

Stay safe and happy coding!

It works .

But why though ?

const addItemButton = document.querySelector('button.addItemButton'); ❌

const addItemButton = document.querySelector('.addItemButton'); βœ”