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 Removing Nodes

Posted by omar hama
omar hama
Courses Plus Student 2,773 Points

Cannot read property 'addEventListener' of null

this is the html code:-

<button class="removeItemButton">Remove last item</button>

and this is the JS code :-

removeItemButton.addEventListener('click', () => { let ul = document.getElementsByTagName('ul')[0]; let li = document.querySelector('li:last-child'); ul.removeChild(li); });

i still gey uncaught typeError: cannot read property 'addEventlistener' of ull

1 Answer

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

Not shown above is the definition of the variable which is critical to proper operation:

const removeItemButton = document.querySelector('button.removeItemButton');

A typo in this statement could easily create the error you are experiencing.