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JavaScript JavaScript and the DOM (Retiring) Responding to User Interaction Adding an Event Listener

Piotr Manczak
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Piotr Manczak
Front End Web Development Techdegree Graduate 29,363 Points
Posted by Piotr Manczak
.a{fill-rule:evenodd;}techdegree seal-36
Piotr Manczak
Front End Web Development Techdegree Graduate 29,363 Points

How to change background color using JavaScript

It doesn't work. It doesn't say why. Any ideas what I'm doing wrong?

app.js 
var warning = document.getElementById("warning");
var button = document.getElementById('makeItRed');

button.addEventListener('click', () => {
  warning.style.background-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>

2 Answers

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,971 Points
KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,971 Points

I believe background-color is what you'd use in CSS. In JavaScript it's backgroundColor.