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

Posted by Brian Johnson
.a{fill-rule:evenodd;}techdegree seal-36
Brian Johnson
Front End Web Development Techdegree Graduate 20,818 Points

What did i miss here? I thought i did all the steps right.

Please let me know what didn't i catch

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

for(var i = 0; i < paragraphs.length; i+= 1){
  paragraphs.style.backgroundColor = "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

You are forgetting to pull the paragraph elements out of the paragraphs collection. In your code you try to modify the style property of the collection itself, which is invalid since collections don't have a style property. Also the task asks you to change the color of the paragraphs, but you are changing the background color instead.

If you use the loop's index to pull out the paragraph and change backgroundColor to color like this:

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

for(var i = 0; i < paragraphs.length; i+= 1){
  paragraphs[i].style.color = "blue";
}

Then your code will work.

Brian Johnson
.a{fill-rule:evenodd;}techdegree seal-36
Brian Johnson
Front End Web Development Techdegree Graduate 20,818 Points

Oh ok thanks! so use the loops index by adding the [i] syntax to pull out the paragraphs individually and change background to color. Oh ok that was an easy fix and i get it. Appreciate your help!