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

confused on how to start this

I'm confused on what I should do.

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

list.addEventListener('click', function(e) {
  if (e.target.tagName == 'BUTTON') {
    list= list.previousElementSibling;

  }
});
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

Steven Parker
Steven Parker
224,872 Points

You have the right idea, but it's not the sibling of the "list" that you want, but the sibling of the button. And the "if" just confirmed that the event target ("e.target") is a button.

Then it's just a matter of assigning the class to it.

Thank you!