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 trialKelly Bransford
5,427 PointsI can't add an item or remove an item after adding an event listener to the parent element...
It was working fine and then I added the Event Listener to the parent element instead of the list items. Now I cant add a new item or remove an item on the page. Can anybody help me figure out what Im missing?
1 Answer
KRIS NIKOLAISEN
54,971 Points1) For adding an item
In index.html your Add item button has class="description"
<button class="description">Add item</button>
However in app.js you are trying to select the button with class="addItemButton"
const addItemButton = document.querySelector('button.addItemButton');
This leads to the following error displayed in the console:
Uncaught TypeError: Cannot read property 'addEventListener' of null
Solution: Change the class to "addItemButton"
<button class="addItemButton">Add item</button>
2) For removing an item
If you check the console when clicking the remove button you will see:
'li: last-child' is not a valid selector.
This is due to the space between li:
and last-child
in your remove button event listener
Solution: Remove the space
let li = document.querySelector('li:last-child');