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

Posted by Lucas Bryce
Lucas Bryce
Courses Plus Student 4,694 Points

How do I select the div, 'warning', so that I can change the colour?

help

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

button.addEventListener('click', function() {
  document.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>

1 Answer

Dmitry Polyakov
Dmitry Polyakov
4,989 Points
Dmitry Polyakov
Dmitry Polyakov
4,989 Points

You already have it selected and saved in a variable called warning. So in a callback function you need just a variable name and append style to it.

button.addEventListener('click', function() {

warning.style.backgroundColor = 'red';\

})

Lucas Bryce
Lucas Bryce
Courses Plus Student 4,694 Points

Thanks