JavaScript JavaScript and the DOM Responding to User Interaction Event Delegation

Evan Loiterman
Evan Loiterman
3,208 Points

The listener is not filtering out the tagname

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

section.addEventListener('click', (e) => {

if(e.target.tagName =='input'){ e.target.style.backgroundColor = 'rgb(255, 255, 0)';

} });

I'm not sure what's wrong with (e.target.tagName =='input') or (e.target=='input') isn't working

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>

1 Answer

Louise St. Germain
MOD
Louise St. Germain
Treehouse Moderator 17,945 Points

Hi Evan,

The target tagName that you'll find in event (e) is always uppercase, so right now it's not working because it's giving uppercase and you're comparing to lowercase. Try changing "input" to "INPUT" and see how it goes!