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

Posted by Matthew Miller
Matthew Miller
3,522 Points

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

Peter Vann
Peter Vann
36,427 Points
Peter Vann
Peter Vann
36,427 Points

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!

Danial Syafiq
Danial Syafiq
9,168 Points

It works .

But why though ?

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

const addItemButton = document.querySelector('.addItemButton'); ✔