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

Leah Birch
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Leah Birch
Front End Web Development Techdegree Graduate 15,110 Points
Posted by Leah Birch
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Leah Birch
Front End Web Development Techdegree Graduate 15,110 Points

I need help with a challenge about event handlers. I'm not sure what I did wrong.

I have to make sure that the event listener only targets the input children of section. I used an if statement to make sure that the code only runs when when the tag name is 'input'.

It would be great if someone explained what I did wrong.

Thank you.

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

Stephan Olsen
Stephan Olsen
6,650 Points
Stephan Olsen
Stephan Olsen
6,650 Points

Great job, your logic is on point. The reason why your code is not working, is that the return value of the property tagName is always in uppercase. https://www.w3schools.com/jsref/prop_element_tagname.asp

For this reason, you simply need to change input to INPUT, and your code should work :)