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

child querySelector in this question

hi, I have typo those code in the app,js const outer = document.querySelector('nav'); let navigationLinks = outer.querySelectorAll('ul li');

after enter check work button, it always show bummer selected wrong link, but I use Console in Devtool , then type my code to the console. actually I can select the needed three list

I can't figure out why?

js/app.js
const outer = document.querySelector('nav');
let navigationLinks = outer.querySelectorAll('ul li');
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>

2 Answers

Hi Po Ya Fan, I think the problem lies with the code after the first variable in app.js. In the const outer, you select "nav", which holds ONLY the NAVIGATION LINKS. However, you have two more variables to declare after that: "galleryLinks" and "footerImages".

Be sure that your other undeclared variables in lines 3 and 4 contain the links from the list with the id "gallery", as well as the footer.

I hope you find this helpful :)

I finally figure out, this question want me to select all <a> under the <nav>, insteal of selecting all <li> under <nav>

the code then be:

const outer = document.querySelector('nav');
let navigationLinks = outer.querySelectorAll('li > a');