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JavaScript JavaScript and the DOM (Retiring) Responding to User Interaction Event Delegation

Gareth Partridge
Gareth Partridge
13,408 Points

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

Currently, the event listener applies a yellow background color to the section element and its child elements when clicked. Add a condition that changes the background of the <input> elements only.

I honestly have no idea on this one, any suggestions ?

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

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

6 Answers

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

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

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

Why do we need "===" instead of just "=="?

Alan Lane
Alan Lane
5,010 Points

since no one here has a clue either, I will skip this challenge as it is really painful to look at!

Steven Parker
Steven Parker
210,935 Points

You'll need to enclose the color assignment in a condtional ("if") statement. The "if" should check the tagName attribute of the clicked item (e.target) to see if it is an "INPUT".

anywayiam
anywayiam
3,731 Points

I have the same problem. It doesn't work.

<!DOCTYPE html>
<html>
    <head>
        <title>JavaScript and the DOM</title>
    </head>
    <link rel="stylesheet" href="style.css" />
    <body>
        <section id='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>
    </body>
</html>
let section = document.getElementById('section');

section.addEventListener('click', (event) => {
  if(event.target.tagName == 'INPUT') {
  event.target.style.backgroundColor = 'rgb(255, 255, 0)';
  }
});
Steven Parker
Steven Parker
210,935 Points

In future, always start a fresh new question instead of posting one as an "answer".

But for this challenge you only need to add a conditional to the event handler. You should not make any changes to the other code including the HTML portion.

Alan Lane
Alan Lane
5,010 Points

WOW! I got lucky, this is the solution that I finally got to work:

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

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

Sean Gibson
Sean Gibson
35,171 Points

I was running around in circles for a while on this one and found that my mistake was typing "tagname" instead of "tagName". Just in case this may help someone