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JavaScript JavaScript and the DOM (Retiring) Traversing the DOM Sibling Traversal

How can a class of highlight be inserted before button?

Not sure how to go about this....

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

list.addEventListener('click', function(e) {
  if (e.target.tagName == 'BUTTON') {
  list.insertBefore (p.highlight, 'button')
  }
});
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>

2 Answers

Steven Parker
Steven Parker
229,644 Points

You won't need to insert any elements for this challenge. You will use DOM traversal to access the exisitng paragraph element before the button and add a class to it.

Dan Weru
Dan Weru
47,649 Points

Hi, See the solution here . It has been explained neatly by Sean T. Unwin Happy Coding!

Steven Parker
Steven Parker
229,644 Points

But do take a shot at solving it yourself before peeking at the answer!