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 Interactive Web Pages with JavaScript Selecting Elements and Adding Events with JavaScript Selecting Elements

Posted by David Lick
David Lick
9,309 Points

Bug in valid code. Undefined function error.

Undefined returned on valid code?

I believe this is a bug.

"var fullName = document.getElementByID("full_name");" should not return as undefined.

app.js 
var fullName = document.getElementByID("full_name");
var lastName;
index.html 
<!DOCTYPE html>
<html>
<head></head>
<body>
<h1 id="full_name"><span class="first_name">Andrew</span> <span class="last_name">Chalkley</span></h1>

<script src="app.js"></script>
</body>
</html>

1 Answer

Jake Lundberg
Jake Lundberg
13,965 Points
Jake Lundberg
Jake Lundberg
13,965 Points

you have last "D" capitalized in .getElementById...it should be lowercase.

David Lick
David Lick
9,309 Points

Thank you sir! You are a saint and a scholar.