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JavaScript JavaScript and the DOM (Retiring) Traversing the DOM Sibling Traversal

suraj Singh
suraj Singh
2,346 Points
Posted by suraj Singh
suraj Singh
2,346 Points

Classname her means like an id attached to the p tag

I just wanted to know that the output should look like this <li><p class="highlight">xx</p><button>xx</button></li> when i click on the button.

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

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

     e.target.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>

1 Answer

Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

You are correct that the code should apply the class to the paragraph, but it currently applies the class to the button itself.

But you're close, and with a small change to the code you can apply the class to the paragraph instead.

suraj Singh
suraj Singh
2,346 Points
suraj Singh
suraj Singh
2,346 Points

Thanks Steven, finally i was able to solve it.

e.target.previousElementSibling.className = "highlight"; console.log(e.target.previousElementSibling);