JavaScript JavaScript and the DOM Traversing the DOM Sibling Traversal

Anton Kilk
Anton Kilk
Full Stack JavaScript Techdegree Student 2,959 Points

What means " add a class of highlight"? Does it mean just to add "style.backgroundColor" to variable?

Code Challenge in Sibling Traversal. What means "add a class of highlight"?

app.js
var list = document.getElementsByTagName('ul')[0];

list.addEventListener('click', function(e) {
  if (e.target.tagName == 'BUTTON') {
    let li = event.target.parentNode;
    let p = e.previousElementSibling;
    p.style.backgroundColor = 'yellow';
  }
});
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>Things to Learn</p>
            <ul>
                <li><p>Element Selection</p><button>Highlight</button></li>
                <li><p>Events</p><button>Highlight</button></li>
                <li><p>Event Listening</p><button>Highlight</button></li>
                <li><p>DOM Traversal</p><button>Highlight</button></li>
            </ul>
        </section>
        <script src="app.js"></script>
    </body>
</html>

1 Answer