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 Interactive Web Pages with JavaScript Traversing and Manipulating the DOM with JavaScript Adding Multiple Event Listeners

Javier MARQUEZ
Javier MARQUEZ
11,877 Points
Posted by Javier MARQUEZ
Javier MARQUEZ
11,877 Points

I think this code challenge has a bug please guys what am I doing wrong

I cannot pass this code challenge, I cant understand why. I am using the 'change' event on the <select> element.

app.js 
//Select select box
var navigationSelect = document.getElementById("nav");

//Navigate to URL when select box is changed
var navigateToValue = function() {
  window.location = this.value;
}

//Send analytics data
var sendAnalytics = function() {
  //Placeholder  
}

navigationSelect.addEventListener('change', 'navigateToValue');
navigationSelect.addEventListener('change', 'sendAnalytics');
index.html 
<!DOCTYPE html>
<html>
  <body>
    <select id="nav">
      <option value="index.html">Home</option>
      <option value="about.html">About</option>
    </select>
    <h1>Home</h1>
    <script src="app.js"></script>
  </body>
</html>
about.html 
<!DOCTYPE html>
<html>
  <body>
    <select id="nav">
      <option value="index.html">Home</option>
      <option value="about.html">About</option>
    </select>
    <h1>About</h1>
    <script src="app.js"></script>
  </body>
</html>

2 Answers

Steven Parker
Steven Parker
231,198 Points
Steven Parker
Steven Parker
231,198 Points

:point_right: You're passing the wrong type of argument.

The second argument to addEventListener should be a callback function, but you've enclosed the function name in quotes which makes it an ordinary string.

Remove the quotes to pass the callback function by name.

Javier MARQUEZ
Javier MARQUEZ
11,877 Points
Javier MARQUEZ
Javier MARQUEZ
11,877 Points

You are right, the documentation says it also.

Thanks a lot