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 AJAX Basics (retiring) AJAX and APIs Make a JSONP request

Why can't we use const for the weather variable?

Why can't we use const for the weather variable? It throws and error when I press "check work".

weather.js
$(document).ready(function() {
var weatherAPI;
});
index.html
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>What's the Weather Like?</title>
  <script src="jquery.js"></script>
  <script src="weather.js"></script>
</head>
<body>
  <div id="main">
    <h1>Current temperature: <span id="temperature"></span>&deg;</h1>
  </div>
</body>
</html>

1 Answer

Steven Parker
Steven Parker
231,269 Points

You can't declare a "const" without assigning a value at the same time, since you will not be allowed to assign one later.

But another issue is the challenges in this course don't accept ES6 syntax. So while it would be legal to use "let", that is also not allowed here. I'm sure this will change when the course is refreshed but for now just stick to ES5 syntax.