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

Help required with syntax error?

I cant remember the ordering for this statement, all help and explanation is appreciated.

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

var userName = .toUpperCase ('id');
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

Erik Krieg
Erik Krieg
43,038 Points

The error you are getting appears to be caused by a misuse of the toUpperCase method. The . preceding the method name

toUpperCase is a method of a string instance, so it is used a bit differently. Instead of passing the string as an argument of toUpperCase, you access the method as a property of the string you wish to uppercase and call it.

In this case, if you wanted "23188xtr" to become "23188XTR" then you would do id.toUpperCase().