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

Adding An Event Listener Challenge

When I check the third task I recive this message : "Oops! It looks like Task 1 is no longer passing" and I not able to see why.

Can you help me please?

Thank you in advance

app.js
const warning = document.getElementById("warning");
const button = document.querySelector("#makeItRed");

button.addEventListener('click' , () => {
  warning.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
231,271 Points

I can see two issues:

  • you wrote "backGroundColor" (with capital "G") instead of "backgroundColor" (little "g")
  • "backgroundColor" is not a method you can call, but it is a property you can assign

That 2nd one is causing a syntax error, and those invalidate the entire script. That's why the re-test of task 1 is failing.

Thank you very much, Steven.