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JavaScript Interacting with the DOM Traversing the DOM Event Delegation

Posted by Nicholas Espinosa
Nicholas Espinosa
7,311 Points

I thought I filtered out all but the 'INPUT' elements?

I used a conditional statement to filter out all but the 'INPUT' elements as was instructed in the video. The code seems to run properly, changing the background color of the 'input' elements when clicked (a different color than that of the 'div' element), but I am receiving an error message that tells me to 'filter out all but the 'INPUT' elements'. Is there a different way that I should be writing this section of code?

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

section.addEventListener('click', (e) => {
  if (event.target.tagName === 'INPUT') {
    e.target.style.backgroundColor = 'blue';
  } else {
  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

Steven Parker
Steven Parker
231,172 Points
Steven Parker
Steven Parker
231,172 Points

You've got two issues:

  • the code should change the background color (using the provided line) of only the input elements
  • you won't need an "else", nothing needs to be done for other elements