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

Mark Dekin
Mark Dekin
26,839 Points
Posted by Mark Dekin
Mark Dekin
26,839 Points

Task 1 is no longer passing, but it should be fine

As a note I did originally have: let paragraphs = section.querySelectorAll('p'); in step 1 but it then told me it needs to be section.children. But anyway I do not see why this isnt working

app.js 
const section = document.querySelector('section');
let paragraphs = section.children;
for (i=0; i<paragraphs.length; i++) {
  paragraphs[i].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>
Mark Dekin
Mark Dekin
26,839 Points
Mark Dekin
Mark Dekin
26,839 Points

NVM I figured out it was that I didnt put 'let i = 0' in the for loop. I am so used to using .forEach rather than for loops in this manner.

1 Answer

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

You haven't declared the variable i.

You need either var or let before the assignment of i in the for statement. The challenge operates in "strict mode" where implicit global declaration is not allowed.