Bummer: One or more of the buttons do not affect their previous sibling paragraphs. What is going on here?

Question

Please explain for me?

app.js

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

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

Answer 1 · 2019-08-03T22:52:03Z

August 3, 2019 10:52pm

You don't want to reassign e. Instead create a new variable and assign it e.target.previousElementSibling. Note: e.target is the button. Then review className here for how to complete the task.

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Evandro Delgado

Evandro Delgado

Bummer: One or more of the buttons do not affect their previous sibling paragraphs. What is going on here?

1 Answer

KRIS NIKOLAISEN

KRIS NIKOLAISEN