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

Aaron Noble
Aaron Noble
6,559 Points

Referencing multiple links in a nav element to your .js file

I am very confused with the different methods used to select items from the DOM. I'm using 'document.getElementsTagName()' to get the links from the nav element. I'm not sure when to use 'document.querySelector()' or 'document.querySelectorAll()' in any case. Could someone please help me with the proper way of coding this solution. Thank you, Aaron

js/app.js
let navigationLinks = document.getElementsByTagName('nav');
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

Tim Knight
Tim Knight
28,863 Points

Hi Aaron,

I tend to stick with document.querySelector() or document.querySelectorAll() when I'm selecting elements personally. This is because I can do a much more complex selector than just selecting items by their tag name. This too lets you select elements within a parent element, just like CSS... for example nav a. The difference between document.querySelector() and document.querySelectorAll() is really in the keyword "All". The first method will give you back the first item on the page were document.querySelectorAll() will return all of the items on the page. So for your example within this first challenge, I would approach it like this:

let navigationLinks = document.querySelectorAll('nav a');