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 JavaScript and the DOM (Retiring) Making Changes to the DOM Styling Elements

Posted by Ben Ahlander
Ben Ahlander
7,528 Points

app.js:14 Uncaught SyntaxError: Unexpected token )

Cant figure out why my JS wont run

const toggleList = document.getElementById('toggleList');
const listDiv = document.querySelector('.list')
const input = document.querySelector('input');
const p = document.querySelector('p.description');
const button = document.querySelector('button');

toggleList.addEventListener('click', () => {
  if (listDiv.style.display == 'none') {
    toggleList.textContent = 'Hide List';
    listDiv.style.display = 'block';
} else {
  toggleList.textContent = 'Show List';
  listDiv.style.display = 'none';                            
});

button.addEventListener('click', () => {
  p.innerHTML = input.value + ':';
});

<!DOCTYPE html>
<html>
  <head>
    <title>JavaScript and the DOM</title>
    <link rel="stylesheet" href="css/style.css">
  </head>
  <body>
    <h1 id="myHeading">JavaScript and the DOM</h1>
    <p>Making a web page interactive</p> 
    <button id="toggleList">Hide List</button>

    <div class="list"> 

      <p class="description">Things that are purple:</p>
     <input type="text" class="description">
      <button id ="to"class=description> Change list description</button>
    <ul>
      <li>grapes</li>
      <li>amethyst</li>
      <li>lavender</li>
      <li>plums</li>
    </ul>

    </div>
    <script src="app.js"></script>
  </body>
</html>

1 Answer

james south
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
james south
Front End Web Development Techdegree Graduate 33,271 Points
james south
.a{fill-rule:evenodd;}techdegree seal-36
james south
Front End Web Development Techdegree Graduate 33,271 Points

in your toggleList event listener, the last line is }); where the curly closes the else block and the paren closes the argument list to addEventListener, but notice you are missing the closing curly for the callback function block. it is expecting another } which is why the ) is an unexpected token.

Steve Gallant
Steve Gallant
14,943 Points

Also, just a note there are some missing spaces and quotes in the second button element tag.