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

manqing cao
seal-mask
.a{fill-rule:evenodd;}techdegree
manqing cao
Full Stack JavaScript Techdegree Student 3,125 Points
Posted by manqing cao
.a{fill-rule:evenodd;}techdegree
manqing cao
Full Stack JavaScript Techdegree Student 3,125 Points

I am not sure why I am wrong

not sure why I am wrong

app.js 
let section = document.getElementsByTagName('section')[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

Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

You're close, but tag names are always upper case:

  if (e.target.tagName === 'INPUT'){
Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

manqing cao — Glad to help. You can mark a question solved by choosing a "best answer".
And happy coding!