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 Interacting with the DOM Responding to Events Adding an Event Listener

Diana Victoria Villada
Diana Victoria Villada
9,543 Points

In the button click handler, apply a background color of "red" to the warning div.

I am getting an error message saying the background doesn't turn red when the button is clicked even though I do get a red background when the button is clicked. What am I doing wrong?

app.js
var button = document.getElementById("makeItRed");
button.addEventListener('click',function(){
  var warning = document.getElementById("warning");
  document.body.style.backgroundColor = '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>

2 Answers

Steven Parker
Steven Parker
229,005 Points

This code applies the red background to the entire document body.
But the instructions ask you to "... apply a background color of "red" to the warning div."

Steven Parker
Steven Parker
229,005 Points

Diana Victoria Villada — Glad to help. You can mark a question solved by choosing a "best answer".
And happy coding!

Diana Victoria Villada
Diana Victoria Villada
9,543 Points

Steven Thank You sooo much that really helped me understand and figure out the problem. :)