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JavaScript JavaScript and the DOM (Retiring) Getting a Handle on the DOM Practice Selecting Elements

LIU XU
LIU XU
1,626 Points
Posted by LIU XU
LIU XU
1,626 Points

why dose these codes not work fine in task1? const navigationlinks = document.querySelectorAll("nav ul li a.href");

why do these codes not work fine in challenge task1 of 3?

const navigationlinks = document.querySelectorAll("nav ul li a.href");

the url of this task is https://teamtreehouse.com/library/javascript-and-the-dom-2/getting-a-handle-on-the-dom/practice-selecting-elements

js/app.js 
const navigationLinks = document.querySelectorAll("nav ul li a.href");
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>

1 Answer

andren
andren
28,558 Points
andren
andren
28,558 Points

Because of the .href part of the selector. By including that you are essentially saying "only select a elements with a class of href" and since no such thing exists on the page it does not select any elements.

You can pass the task by simply removing that from the selector.

mark van den broek
mark van den broek
Courses Plus Student 1,833 Points
mark van den broek
mark van den broek
Courses Plus Student 1,833 Points

you can also pass it by just using document.querySelectorAll('nav a');