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JavaScript JavaScript Basics (Retired) Making Decisions with Conditional Statements Introducing Conditional Statements

Posted by STEWART DAVIS
STEWART DAVIS
2,241 Points

There was an error with your code: TypeError: 'null' is not an object (evaluating 'answer.toUpperCase

Here is my code. I run this in a separate console and it runs fine. No errors.

var answer = prompt("What is the best programming language?"); if (answer.toUpperCase() === 'JAVASCRIPT') { document.write("<h2>Yup, that/'s the one.</h2>") }

app.js 
var answer = prompt("What is the best programming language?");

if (answer.toUpperCase() === 'JAVASCRIPT') {
    document.write("<h2>Yup, that/'s the one.</h2>");
}
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>

2 Answers

Matthew Rigdon
Matthew Rigdon
8,223 Points
Matthew Rigdon
Matthew Rigdon
8,223 Points

First, the test asks you write alert messages with differing sentences. Also, the test wants you to check if it matches "JavaScript" not in capital letters.

Samy Basset
Samy Basset
11,862 Points
Samy Basset
Samy Basset
11,862 Points

Strings need to be typed exactly as asked, capital letters, spaces, punctuation etc.