Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

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".

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

1 Answer

Steven Parker
Steven Parker
218,813 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.