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

Posted by John Smith
John Smith
111 Points

What other ways are there to select get a DOM element by its ID attribute?

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

Julian Shadrin
Julian Shadrin
15,727 Points
Julian Shadrin
Julian Shadrin
15,727 Points

An alternative to document.getElementById() is document.querySelector(); const warning = document.querySelector('#warning'); const button = document.querySelector('#makeItRed');

Steven Parker
Steven Parker
231,264 Points
Steven Parker
Steven Parker
231,264 Points

When posting code, use Markdown formatting to preserve the code's appearance and retain special symbols.

Your examples with formatting:

const warning = document.querySelector('#warning');
const button = document.querySelector('#makeItRed');