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) Responding to User Interaction Event Delegation

Yu-Che Hung
PLUS
Yu-Che Hung
Courses Plus Student 10,607 Points
Posted by Yu-Che Hung
Yu-Che Hung
Courses Plus Student 10,607 Points

JavaScript and the DOM event delegation

don't know why this can't work

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

section.addEventListener('click', (event) => {
  if(event.target.tagName =='input'){
  event.target.style.backgroundColor = 'rgb(255, 255, 0)';
  }
});

1 Answer

Chyno Deluxe
Chyno Deluxe
16,936 Points

your code is correct with the exception that the tagName should be uppercase instead of lowercase.

if (event.target.tagName == "INPUT") {

i hope this helps

Yu-Che Hung
Yu-Che Hung
Courses Plus Student 10,607 Points
Yu-Che Hung
Yu-Che Hung
Courses Plus Student 10,607 Points

I got it. I just searched the information. the returned value of the tagName property is always in UPPERCASE. THANKS Chyno!