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

Kevin Beall
Kevin Beall
13,828 Points
Posted by Kevin Beall
Kevin Beall
13,828 Points

What am I doing wrong?

I can't see how what I have written does not change the color of every <p> element :'(

Please help

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

for(i = 0; i < paragraphs.length; i += 1){
  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>

3 Answers

Steven Parker
Steven Parker
229,644 Points
Steven Parker
Steven Parker
229,644 Points

You're assigning the loop index without declaring it. They don't say, but I'd guess the challenge runs in "strict" mode where implicit globals are not allowed.

Kevin Beall
Kevin Beall
13,828 Points
Kevin Beall
Kevin Beall
13,828 Points

ahhh.... thank you Steven.

Andrew Thomas
seal-mask
.a{fill-rule:evenodd;}techdegree
Andrew Thomas
Front End Web Development Techdegree Student 14,698 Points
Andrew Thomas
.a{fill-rule:evenodd;}techdegree
Andrew Thomas
Front End Web Development Techdegree Student 14,698 Points

Never mind; I figured it out :) The code should be: 

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

for (let i = 0; i < paragraphs.length; i += 1) {
  paragraphs[i].style.color = 'blue';
};
Steven Parker
Steven Parker
229,644 Points
Steven Parker
Steven Parker
229,644 Points

And "var" would also work as well as "let".