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 Interacting with the DOM Traversing the DOM Event Delegation

Jasmine VanExel
Jasmine VanExel
3,522 Points
Posted by Jasmine VanExel
Jasmine VanExel
3,522 Points

Interacting with the DOM Challenge task 1 of 1, works in the preview, but code not accepted::

How do I prevent type error?

app.js 
let section = document.getElementsByTagName('ul')[0];

section.addEventListener('click', (e) => {
  if(e.target.tagName === 'INPUT') {
  e.target.style.backgroundColor = 'rgb(255, 255, 0)';
  }
});
index.html 
<!DOCTYPE html>
<html>
    <head>
        <title>JavaScript and the DOM</title>
    </head>
    <link rel="stylesheet" href="style.css" />
    <body>
        <section>
            <h1>Making a Webpage Interactive</h1>
            <p>JavaScript is an exciting language that you can use to power web servers, create desktop programs, and even control robots. But JavaScript got its start in the browser way back in 1995.</p>
            <hr>
            <p>Things to Learn</p>
            <ul>
                <li>Item One: <input type="text"></li>
                <li>Item Two: <input type="text"></li>
                <li>Item Three: <input type="text"></li>
                <li>Item Four: <input type="text"></li>
            </ul>
            <button>Save</button>
        </section>
        <script src="app.js"></script>
    </body>
</html>

2 Answers

Jasmine VanExel
Jasmine VanExel
3,522 Points
Jasmine VanExel
Jasmine VanExel
3,522 Points

Never mind, I figured it out :-)

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

For the benefit of other readers, it might be nice to point out that changing the argument on the top line from "selection" to "ul" is not part of the challenge task and caused the error.