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JavaScript JavaScript and the DOM Getting a Handle on the DOM Return Elements Using CSS Selectors

Posted by ilia martynenko
ilia martynenko
Courses Plus Student 4,961 Points

Just lost, poor explanation of topic...

Actually don't understand why this code return only one link... let galleryLinks = document.querySelectorAll("#gallery"); No explanation in video, page from MDN doesn't help.

app.js 
let navigationLinks = document.querySelectorAll("nav a");
let galleryLinks = document.querySelectorAll("#gallery");
let footerImages;
index.html 
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Treehouse Student | Designer</title>
    <link rel="stylesheet" href="css/normalize.css">
    <link href='http://fonts.googleapis.com/css?family=Changa+One|Open+Sans:400italic,700italic,400,700,800' rel='stylesheet' type='text/css'>
    <link rel="stylesheet" href="css/main.css">
    <link rel="stylesheet" href="css/responsive.css">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
  </head>
  <body>
    <header>
      <a href="index.html" id="logo">
        <h1>Treehouse Student</h1>
        <h2>Designer</h2>
      </a>
      <nav>
        <ul>
          <li><a href="#" class="selected">Work</a></li>
          <li><a href="#">About</a></li>
          <li><a href="#">Contact</a></li>
        </ul>
      </nav>
    </header>
    <div id="wrapper">
      <section>
        <ul id="gallery">
          <li>
            <a href="#">
              <img src="img/numbers-01.jpg" alt="The number 1 painted with colors and textures.">
              <p>Experimentation with color and texture.</p>
            </a>
          </li>
          <li>
            <a href="#">
              <img src="img/numbers-02.jpg" alt="The number 2 painted with various colors blended together.">
              <p>Playing with blending modes in Photoshop.</p>
            </a>
          </li>
        </ul>
      </section>
      <footer>
        <a href="https://twitter.com/treehouse"><img src="img/twitter-wrap.png" alt="Twitter Logo" class="social-icon"></a>
        <a href="https://www.facebook.com/TeamTreehouse"><img src="img/facebook-wrap.png" alt="Facebook Logo" class="social-icon"></a>
        <p>&copy; Treehouse Student.</p>
      </footer>
    </div>
    <script src="app.js"></script>
  </body>
</html>

3 Answers

Armin Kadic
Armin Kadic
16,242 Points
Armin Kadic
Armin Kadic
16,242 Points

Hi Ilia!

I guess you are stuck at the second challenge?

"Next, select all <a> elements inside the unordered list with the ID gallery and assign them to the variable galleryLinks.

If that's the case, then you forgot to add the "a" next to the "gallery", since it asks you to select all <a> elements inside the ul gallery. You selected the entire gallery, so all that is needed is an "a" next to the #gallery - let galleryLinks = document.querySelectorAll("#gallery a");

I hope this clarifies it for you, and feel free to ask if you need more help :)

ilia martynenko
PLUS
ilia martynenko
Courses Plus Student 4,961 Points
ilia martynenko
ilia martynenko
Courses Plus Student 4,961 Points

Armin, Thank you so much for your help, everything works fine, when used document.querySelectorAll("#gallery") - received a message that it should be 2 objects not one, maybe that's why I'm confused Thx one more time for your help!!!

Armin Kadic
Armin Kadic
16,242 Points
Armin Kadic
Armin Kadic
16,242 Points

I'm glad I could help :)

Jace Vanwagoner
Jace Vanwagoner
6,767 Points
Jace Vanwagoner
Jace Vanwagoner
6,767 Points

They should go over these in a little more detail all the different variations. Attribute selector, Pseudo-class and this Descendant Selector. I searched MDN and rewatched all the videos and teacher notes and still struggled to find a clear answer. or even adding a HINT to this question would have been super helpful.

Thank you Armin for the Help!