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 JavaScript Basics (Retired) Storing and Tracking Information with Variables Using String Methods

peterson st gourdain
peterson st gourdain
931 Points
Posted by peterson st gourdain
peterson st gourdain
931 Points

I'm still stuck

whats wrong in my code

app.js 
var id = "23188xtr";
var lastName = "Smith";

var userName = id.toUpperCase("=+23188xtr");
index.html 
<!DOCTYPE HTML>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>JavaScript Basics</title>
</head>
<body>
<script src="app.js"></script>
</body>
</html>

1 Answer

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

The toUpperCase() method does not take any parameters.

To build up the final result, you might use concatenation (indicated by a + symbol) between individual strings to "stick them together".