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) Responding to User Interaction Adding an Event Listener

Nazeim Brame
Nazeim Brame
6,544 Points
Posted by Nazeim Brame
Nazeim Brame
6,544 Points

Not sure how to add a red background to the waring variable

*warning variable

app.js 
var warning = document.getElementById("warning");
var button = document.getElementById("makeItRed");
button.addEventListener('click', () => {
  warning.color = red;
})
index.html 
<!DOCTYPE html>
<html>
    <head>
        <title>Adding an Event Listener</title>
    </head>
    <link rel="stylesheet" href="style.css" />
    <body>
        <div id="warning">
            Warning: My background should be red!
        </div>
        <button id="makeItRed">Make It Red!</button>
        <script src="app.js"></script>
    </body>
</html>

1 Answer

A R
A R
12,834 Points
A R
A R
12,834 Points

You're close! Just keep in mind that in Javascript, your CSS properties use camel case. So you want to refer to background-color, but in JS it would read: warning.backgroundColor = 'red';

I tried that change and cleared the challenge with your code! I also added the quotes around the 'red' since it's a good habit to get into.