Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

Posted by Mike John
Mike John
3,182 Points

Why is this code not working..? Can someone help please

Why is this code not working..? Can someone help please

app.js 
const section = document.querySelector('section');
let paragraphs= section.children;

for (let i = 0 ; i < paragraphs.length ; i++){
paragraphs.style.color = "blue";
}
index.html 
<!DOCTYPE html>
<html>
    <head>
        <title>Child Traversal</title>
    </head>
    <body>
        <section>
            <p>This is the first paragraph</p>
            <p>This is a slightly longer, second paragraph</p>
            <p>Shorter, last paragraph</p>
        </section>
        <footer>
            <p>&copy; 2016</p> 
        </footer>
        <script src="app.js"></script>
    </body>
</html>

1 Answer

andren
andren
28,558 Points
andren
andren
28,558 Points

As the challenge states paragraphs contains a collection of elements. To apply styling to those elements you need to pull out the individual element with a loop. You have created the loop correctly but you are not pulling out the elements, you are trying to modify the style of the collection itself.

To pull out an individual element you can simply use bracket notation like this:

const section = document.querySelector('section');
let paragraphs= section.children;

for (let i = 0 ; i < paragraphs.length ; i++){
  paragraphs[i].style.color = "blue";
}

By placing a bracket after paragraphs you can specify an index that you want to pull out, since i will start at 0 and increment with each loop it can be used to pull out each individual item in the collection.