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

Posted by Haardik Gupta
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Haardik Gupta
Full Stack JavaScript Techdegree Student 5,459 Points

i dont know what to do

The <ul> stored in the variable list has a click event listener that targets each <button> in the list. Complete the code to add a class of highlight to a <p> element that's an immediate previous sibling of the button being clicked.

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

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

   }
  }
});
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

Your task is to address the paragraph by using sibling traversal from the button, and set the class on it.

You won't need any additional conditional ("if") code.

Haardik Gupta
.a{fill-rule:evenodd;}techdegree
Haardik Gupta
Full Stack JavaScript Techdegree Student 5,459 Points

i am sill very confused on what to do

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

You might want to take another look at the video that covers using previousElementSibling.