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jclaurent2
Front End Web Development Techdegree Student 10,899 PointsThere was an error with your code: TypeError: 'undefined' is not an object (evaluating '_p.previousElement.Sibling')
Hi,
Any idea to crack it?
var list = document.getElementsByTagName('ul')[0];
var p = document.querySelector('p.highlight');
list.addEventListener('click', function(e) {
if (e.target.tagName == 'BUTTON') {
let p = event.target.parentNode;
let prevP = p.previousElement.Sibling;
if (prevLi) {
let ul = insertBefore(prevP,p);
}
p.highlight = p.highlight.style.background.green
}
});
<!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 class = 'highlight'>Element Selection</p><button>Highlight</button></li>
<li><p class = 'highlight'>Events</p><button>Highlight</button></li>
<li><p class = 'highlight'>Event Listening</p><button>Highlight</button></li>
<li><p class = 'highlight'>DOM Traversal</p><button>Highlight</button></li>
</ul>
</section>
<script src="app.js"></script>
</body>
</html>
2 Answers
Rabin Gharti Magar
Front End Web Development Techdegree Graduate 20,928 PointsHey jc laurent,
Add this inside your if code block: e.target.previousElementSibling.className = "highlight";
Your final code should look like this:
var list = document.getElementsByTagName('ul')[0];
list.addEventListener('click', function(e) {
if (e.target.tagName == 'BUTTON') {
e.target.previousElementSibling.className = "highlight";
}
});
Happy Coding!
jclaurent2
Front End Web Development Techdegree Student 10,899 PointsThks