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) Getting a Handle on the DOM A Simple Example

Posted by Ryan Parry
Ryan Parry
4,264 Points

'addEventListener' null? Code from video is not working.

I followed Guil in his video and typoed the code the same...however the console says "app.js:3 Uncaught TypeError: Cannot read property 'addEventListener' of null".

My code:

const myHeading = document.getElementById('myHeading');

myHeading.addEventListener('click', () => { myHeading.stlye.color = 'red' });

I even downloaded the course files and tried the code from that and got the same error. It doesn't work anymore..

1 Answer

Ryan Parry
Ryan Parry
4,264 Points
Ryan Parry
Ryan Parry
4,264 Points

Figured it out. I put linked to app.js before the <h1> tag. My fault.