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marcosmelo
4,579 PointsEven the background was becoming red. The question seems wrong.
When checking the preview mode, the background is becoming red on click. Why my code is wrong?
const warning = document.getElementById("warning");
let button = document.getElementById('makeItRed');
button.addEventListener('click', () => {
document.body.style.backgroundColor = "red";
});
<!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
Jennifer Nordell
Treehouse TeacherHi there! I received your request for assistance. The reason your entire document is becoming red, is very simply because you told it to 
In this line, you are telling the code to turn everything in the <body> tags red:
document.body.style.backgroundColor = "red";
Note the "body" part of the previous line. This selects the body portion of the document and turns the background color red. Which is the entire viewable portion of the document. You were only meant to turn the div with the id of "warning" red. Luckily, you set up a const in the very first line of the code that selects that particular div.
So instead of selecting the body and assigning red, it should be:
warning.style.backgroundColor = "red";
Here, we use the variable/constant that holds the div with the id of "warning" and we set its background color to red.
Hope this helps!
marcosmelo
4,579 PointsI figured it out. I had to assign it to the div.
button.addEventListener('click', () => {
warning.style.backgroundColor = "red";
});
Is the right answer.