Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

JavaScript JavaScript and the DOM (Retiring) Responding to User Interaction Listening for Events with addEventListener()

Copying his code exactly results in error...?

const listItems = document.getElementsByTagName('li');

for (let i = 0; i < listItems.length; i++) {
    console.log(`In Loop: ${i}`);
    listItems[i].addEventListener('mouseover', () => {
                               listItems[i].textContent = listItems[i].textContent.toUpperCase();
    listItems.addEventListener('mouseout', () => {
                               listItems[i].textContent = listItems[i].textContent.toLowerCase();

Error: Uncaught TypeError: listItems.addEventListener is not a function

Really stuck here....help please

edit: forgot [i] in one place.....nevermind!