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) Getting a Handle on the DOM Practice Selecting Elements

Timothy Le
Timothy Le
126 Points
Posted by Timothy Le
Timothy Le
126 Points

JavaScript and DOM task

I am stuck on what to do. Could you help me? I tried doing getElementsByTagName for 'ul' and 'nav' but those were not correct

js/app.js 
let navigationLinks = document.getElementsByTagName('ul');
let galleryLinks;
let footerImages;
index.html 
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Nick Pettit | 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>Nick Pettit</h1>
        <h2>Designer</h2>
      </a>
      <nav>
        <ul>
          <li><a href="index.html" class="selected">Portfolio</a></li>
          <li><a href="about.html">About</a></li>
          <li><a href="contact.html">Contact</a></li>
        </ul>
      </nav>
    </header>
    <div id="wrapper">
      <section>
        <ul id="gallery">
          <li>
            <a href="img/numbers-01.jpg">
              <img src="img/numbers-01.jpg" alt="">
              <p>Experimentation with color and texture.</p>
            </a>
          </li>
          <li>
            <a href="img/numbers-02.jpg">
              <img src="img/numbers-02.jpg" alt="">
              <p>Playing with blending modes in Photoshop.</p>
            </a>
          </li>
        </ul>
      </section>
      <footer>
        <a href="http://twitter.com/nickrp"><img src="img/twitter-wrap.png" alt="Twitter Logo" class="social-icon"></a>
        <a href="http://facebook.com/nickpettit"><img src="img/facebook-wrap.png" alt="Facebook Logo" class="social-icon"></a>
        <p>&copy; 2016 Nick Pettit.</p>
      </footer>
    </div>
  <script src="js/app.js"></script>
  </body>
</html>
Timothy Le
Timothy Le
126 Points
Timothy Le
Timothy Le
126 Points

(I need to set navigationLinks be the the 3 nav elements)

3 Answers

Steven Parker
Steven Parker
231,046 Points
Steven Parker
Steven Parker
231,046 Points

So you'll need to use two functions, or a function that can take a complex selector.

A couple of additional hints:

  • the identifier for a link (also known as "anchor") element is the letter "a"
  • you probably won't need any explicit references to the ul element
Timothy Le
Timothy Le
126 Points
Timothy Le
Timothy Le
126 Points

At this point in the tutorial, have we learned of such a complex selector or how to have two functions? I don't recall that we have.

Timothy Le
Timothy Le
126 Points
Timothy Le
Timothy Le
126 Points

I am using querySelectorAll(), but I'm not formatting the arguments properly. Could you give e guidance on how to specify the nav elements?

Steven Parker
Steven Parker
231,046 Points
Steven Parker
Steven Parker
231,046 Points

querySelectorAll("nav a")