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

Christopher Bate
Christopher Bate
4,736 Points

Huh?

It is saying that task 1 no longer passes. When I go back to task 1 it passes fine?

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

for (var p in paragraphs){
  p.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>

2 Answers

Juan Pablo Pinto Santana
Juan Pablo Pinto Santana
15,719 Points

Hi!

The kind of loop you're using is only for iterating the enumerable properties of an object. In this case, the object is a HTMLCollection object. To access the elements (only the paragraphs) contained in that object (which are also properties of the object, but the keys for these properties are numerical strings):

for (var i = 0; i < paragraphs.length; i++) {
    paragraphs[i].style.color = 'blue';
}
Angelica Hart Lindh
Angelica Hart Lindh
19,465 Points

ES2015 syntax with Array.forEach and Arrow Function for iterating through items of an Array or NodeList:

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

paragraphs.forEach(paragraph => paragraph.style.color = 'blue')