JavaScript JavaScript and the DOM Responding to User Interaction Event Delegation

Nicholas King
Nicholas King
3,350 Points

Currently, the event listener applies a yellow background color to the section element and its child elements when click

Stuck here, please help.

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

section.addEventListener('click', (e) => {
 if(e.target.tagName === 'INPUT') {
  e.target.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>

Hi Nicholas King,

In the challenge you have to change the background colour of input when user clicks on it. For that you need to select input element in your event listener callback.

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

section.addEventListener('click', (e) => {
  const input = section.querySelector('input');
  input.style.backgroundColor = 'rgb(255, 255, 0)';
});

1 Answer