I need help with this challenge. i spent hours on it.

Question

please let me know your solution.

app.js

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

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

Answer 1 · 2020-06-03T19:50:56Z

June 3, 2020 7:50pm

The "e" parameter represents an event object, which has no "previousElementSibling" attribute. The element associated with the event is "e.target":

  let p = e.target.previousElementSibling;

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Ali Abbas

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I need help with this challenge. i spent hours on it.

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Steven Parker

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Ali Abbas

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