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

Jake Ford
Jake Ford
9,230 Points
Posted by Jake Ford
Jake Ford
9,230 Points

I can't use getElementsByTagName() here?

I tried using getElementsByTagName() for this exercise on all three variables, but it didn't work. I guess I can only add 1 element as a parameter to this method?

querySelectorAll works, and I'm guessing that is because it is a css selector; so it works kind of like it would if you were just writing regular css (With a 'p' element inside of 'div'): div p{ color: black };

I just wanted to be sure I am doing this the correct and efficient way.. I feel like querySelector always works, so why not use it all the time?

js/app.js 
let navigationLinks = document.querySelectorAll('nav a');
let galleryLinks = document.querySelectorAll('#gallery a');
let footerImages = document.querySelectorAll('footer img');
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>
Abhijit Das
Abhijit Das
5,022 Points
Abhijit Das
Abhijit Das
5,022 Points

I am also looking for it's answer; however I read here https://stackoverflow.com/questions/7941172/when-to-use-queryselectorall it's more useful when all other common methods to select an element are failed at that time. Like it should use for complex selection. Though I am not sure is it the best answer or not.