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JavaScript JavaScript and the DOM Traversing the DOM Sibling Traversal

Answer?

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

list.addEventListener('click', function(event) {
  if (event.target.tagName == 'BUTTON') {
    let p = event.target.previousELementSibling;
    let button = p.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
208,472 Points

You're getting close, but:

  • you should not modify the provided code (leave the parameter name as "e")
  • the property "previousELementSibling" should be spelled "previousElementSibling" (with lower-case "l")
  • you won't need to assign "button" or reference the parent node (the button isn't the parent anyway)
  • you still need to set the class name on the paragraph to "highlight"