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HTML

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About the <head>

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Insecure Resource

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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <header>
  <a href="#main-content" class="skip-link">Skip to Content</a>
  <div class="header-content">
    <p class="site-title">Example Site</p>
    <nav>
      <ul>
        <li><a href="#welcome">Test Smooth Scroll</a></li>
        <li><a href="https://equalizedigital.com/">Home</a></li>
        <li><a href="https://equalizedigital.com/about/">About</a></li>
        <li><a href="https://equalizedigital.com/accessibility-checker">Accessibility Checker</a></li>
        <li><a href="https://equalizedigital.com/contact/">Contact</a></li>
      </ul>
    </nav>
  </div>
</header>

<main id="main-content" class="main">

  <h1 id="welcome">Welcome to Our Website</h1>
  <p>This is the main content of the page. We put it really far down just to see how smooth scroll works.</p>
  <p>Here is a link to the <a href="https://equalizedigital.com/">Equalize Digital website</a> just to have another focusable element on the page within the main tag.</p>
</main>
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CSS 

              
                /* Hide the skip link visually */
.skip-link {
  position: absolute;
  left: -9999px;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none; /* Disable mouse events */
}

/* Show the skip link when it receives keyboard focus */
.skip-link:focus {
  position: static; /* Return to the normal flow */
  opacity: 1;
  background: #fff;
  padding: 10px;
  left: auto;
  pointer-events: auto; /* Enable mouse events */
}

/* Header styling */
.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #333;
  padding: 40px 20px;
}

header .site-title {
  font-size: 2em;
  color: #eee;
  font-weight: 700;
  float: left;
}

/* Navigation styling */
nav ul {
  list-style: none; /* Remove bullets */
  padding: 0;
  margin: 0;
}

nav ul li {
  display: inline-block;
  margin-right: 20px;
}

nav ul li a {
  text-decoration: none;
  color: #fff;
  font-weight: bold;
}

nav ul li a:hover {
  text-decoration: underline;
}

/* Main Content styling */

.main {
  background: #f3f4fd;
  padding: 300px 20px;
  text-align: center;
}

/* CSS for smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Media Query for screens narrower than 500px */
@media screen and (max-width: 600px) {
  .header-content {
    display: flex;
    flex-direction: column; /* Stack elements vertically on small screens */
    justify-content: left;
    align-items: center;
  }

  .site-title {
    font-size: 1.2em;
    width: 80%;
  }

  nav {
    width: 80%;
  }

  nav ul li {
    display: block;
    margin: 10px 0;
  }
}
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JS 

              
                // Function to handle smooth scrolling and focus shifting
function smoothScrollToTarget(targetId) {
  const targetElement = document.getElementById(targetId);

  if (targetElement) {
    targetElement.scrollIntoView({
      behavior: "smooth",
      block: "start" // Scroll to the top of the element
    });

    targetElement.setAttribute("tabindex", "-1"); // Make the target element focusable
    targetElement.focus(); // Shift keyboard focus to the target element
    targetElement.removeAttribute("tabindex"); // Remove tabindex after focus
  }
}

// Event listener for smooth scrolling when clicking links
document.addEventListener("click", (event) => {
  if (
    event.target.tagName === "A" &&
    event.target.getAttribute("href").startsWith("#")
  ) {
    event.preventDefault(); // Prevent the default link behavior

    const targetId = event.target.getAttribute("href").substring(1); // Remove the '#' character
    smoothScrollToTarget(targetId);
  }
});
!
999px

Console