JavaScript JavaScript and the DOM Responding to User Interaction Event Delegation

Viktoria S
Viktoria S
6,773 Points

Can somebody tell what should be the solution to this child element selection challenge?

I tried to select just the <li> or li:input or [type=text]. None of them worked. So I guess I'm missing something for this challenge. Can someone point out what is missing? Thanks

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', (e) => {
  if (e.target.tagName == '[type=text]'){
    e.target.style.backgroundColor = 'rgb(255, 255, 0)';    
  }

});

2 Answers

Adam Beer
Adam Beer
11,267 Points

You are so close. But after the tagName not equal to "INPUT". Inside the if statement use the "return" statement.

Antti Lylander
Antti Lylander
9,659 Points

there is no need removing any curly braces any more as using return

Antti Lylander
Antti Lylander
9,659 Points

Like Adam said, you are very close. Just check this:

https://developer.mozilla.org/en-US/docs/Web/API/Element/tagName

For DOM trees which represent HTML documents, the returned tag name is always in the canonical upper-case form. For example, tagName called on a <div> element returns "DIV".

The code you posted, does not work because .tagName will never return any attribute names or values.

Antti Lylander
Antti Lylander
9,659 Points

Adam, did you pass this challenge with your solution? Did you try it in action?

It does not work. What is the purpose of return in your code?

You can omit curly braces only if there is only one statement to be executed when the condition is true. I don't think it is a good practice however.

Adam Beer
Adam Beer
11,267 Points

Haha, you are right. I had happy when the challenge accepted mmy solution but it was long ago. But now I realized what the solution was.