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

Loftur Einarsson
Loftur Einarsson
3,591 Points
Posted by Loftur Einarsson
Loftur Einarsson
3,591 Points

JavaScript DOM challenge, very much stuck

Can not figure this out. Trying to attach highlight as the button's preceding paragraph's class name.

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

list.addEventListener('click', function(e) {
  if (e.target.tagName == 'BUTTON') {
      let button = event.target.parentNode;
      let parentList = button.parentNode;
      let p = button.previousElementSibling;
      p.className = 'highlight';
  }
});
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
231,271 Points
Steven Parker
Steven Parker
231,271 Points

You've got the right idea, but the test provided of the tagName has already determined that "e.target" is the button and not its parent. So you should assign that to "button" instead.