Uncaught ReferenceError: $tShirtDesignDropdown is not defined at app.js:34

Hi Karl,

You see how in lines 7 and 8 of app.js you have the two following statements:

var jobItem = document.querySelector('#title');
var fieldset = document.querySelector('fieldset');

Those two statements declare the variables jobItem and fieldset and assign elements to them.

You never do that for the variable $tShirtDesignDropdown, so when you try to call the change method on $tShirtDesignDropdown on line app.js:34, the JavaScript interpreter is like, "What is $tShirtDesignDropdown? It's not a value, it's not anything right now. And because it's not anything, it doesn't have a change method to execute." The app crashes at that point and sends you the error message you're receiving.

So at some point in your code before you reach line app.js:34, you need to declare and assign a value to $tShirtDesignDropdown.