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

Posted by OSMAN KAMARA
.a{fill-rule:evenodd;}techdegree seal-36
OSMAN KAMARA
Front End Web Development Techdegree Graduate 33,856 Points

Super stuck! any help will be greatly appreciated!

https://teamtreehouse.com/library/javascript-and-the-dom-2/traversing-the-dom/sibling-traversal

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

list.addEventListener('click', function(e) {
  if (e.target.tagName == 'BUTTON') {
    let li = event.target.parentNode;
    let ul = li.parentNode;
  }
});
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

Here's some hints:

  • they say to target the "element immediately preceding that button", so you don't need the parent
  • use the property that refers to the element before the current one (check the docs)
  • set the className on that other element (or use classList.add())
juliemaccluskey
juliemaccluskey
11,597 Points

was stuck on this as well. These hints really helped without giving away the answer. thanks!

Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

Glad to help, and I'm always resistant to leaving spoilers!

Happy coding!