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Nick Retel
Courses Plus Student 4,516 Pointse.target.previousSibling.className += " highlight"; affects all buttons / p elements why is this not correct?
Why is this code not correct according to Teamtreehouse? It works as expected:
e.target.previousSibling.className += " highlight";
const list = document.getElementsByTagName('ul')[0];
list.addEventListener('click', function(e) {
if (e.target.tagName == 'BUTTON') {
e.target.previousSibling.className += " highlight";
}
});
<!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>
2 Answers
Jason Anello
Courses Plus Student 94,610 PointsHi Nick,
The tester doesn't want the space you have before highlight.
I think your intention was to add the class to what is already there, making sure there's a space.
You should assume that the class should be set to "highlight" only.
Nick Retel
Courses Plus Student 4,516 PointsYeah you are correct. "Add a highlight class" made me think I had to add an additional class. Got it sorted now.