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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <div class="banner">
  <h1>Sticky header</h1>
  <h4>With dynamic height and custom offset</h4>
</div>
<main>
  <header>
    <div class="header header--alpha">
      <h1><a href="https://www.rollingstone.com/politics/politics-news/fear-and-loathing-in-las-vegas-204655/">Fear and Loathing in Las Vegas</a></h1>
      <h4>A savage journey to the heart of the American dream</h4>
      <h4>By: Hunter S. Thompson</h4>
    </div>
    <div class="header header--beta">
      <h3><a href="https://www.rollingstone.com/politics/politics-news/fear-and-loathing-in-las-vegas-204655/">Fear and Loathing in Las Vegas</a></h3>
    </div>
  </header>
  <div class="fake-header"></div>
  <article>
    <section>
      <p><small>The full book is available <a href="https://www.rollingstone.com/politics/politics-news/fear-and-loathing-in-las-vegas-204655/">here</a>.</small></p>
      <h1>Fear and Loathing in Las Vegas</h1>
      <p>We were somewhere around Barstow on the edge of the desert when the drugs began to take hold. I remember saying something like “I feel a bit lightheaded; maybe you should drive. …” And suddenly there was a terrible roar all around us and the sky was full of what looked like huge bats, all swooping and screeching and diving around the car, which was going about 100 miles an hour with the top down to Las Vegas. And a voice was screaming: “Holy Jesus! What are these goddamn animals?”</p>
      <h2>
Fear and Loathing on the Campaign Trail</h2>
      <p>Then it was quiet again. My attorney had taken his shirt off and was pouring beer on his chest, to facilitate the tanning process. “What the hell are you yelling about?” he muttered, staring up at the sun with his eyes closed and covered with wraparound Spanish sunglasses. “Never mind,” I said. “It’s your turn to drive.” I hit the brakes and aimed the Great Red Shark toward the shoulder of the highway. No point mentioning those bats, I thought. The poor bastard will see them soon enough.</p>
      <p>It was almost noon, and we still had more than 100 miles to go. They would be tough miles. Very soon, I knew, we would both be completely twisted. But there was no going back, and no time to rest. We would have to ride it out. Press registration for the fabulous Mint 400 was already underway, and we had to get there by four to claim our soundproof suite. A fashionable sporting magazine in New York had taken care of the reservations, along with this huge red Chevy convertible we’d just rented off a lot on the Sunset Strip … and I was, after all, a professional journalist; so I had an obligation to cover the story, for good or ill.</p>
      <p>The sporting editors had also given me $300 in cash, most of which was already spent on extremely dangerous drugs. The trunk of the car looked like a mobile police narcotics lab. We had two bags of grass, 75 pellets of mescaline, five sheets of high-powered blotter acid, a salt shaker half full of cocaine, and a whole galaxy of multi-colored uppers, downers, screamers, laughers … and also a quart of tequila, a quart of rum, a case of Budweiser, a pint of raw ether and two dozen amyls.</p>
      <p>All this had been rounded up the night before, in a frenzy of high-speed driving all over Los Angeles County – from Topanga to Watts, we picked up everything we could get our hands on. Not that we needed all that for the trip, but once you get locked into a serious drug collection, the tendency is to push it as far as you can.</p>
    </section>
  </article>
</main>
            
          
!
            
              * {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

body {
  font-family: sans-serif;
  line-height: 1.6;
  font-size: 20px;
}

.banner {
  background-image: linear-gradient(to top left, purple, darkblue);
  color: lighten(darkmagenta, 25%);
  padding: 1rem 2rem 2rem;

  h1 {
    font-weight: 100;
    letter-spacing: 0.01em;
    margin-bottom: 0.5em;
  }

  h4 {
    font-weight: 900;
    letter-spacing: 0.02em;
  }
}

.fake-header {
  height: 1px;
  position: relative;
}

header {
  top: 0;
  color: darkmagenta;
  text-shadow: 0 1px 0 aliceblue;
  position: relative;
  overflow: hidden;
  pointer-events: none;
  
  a {
    color: inherit;
  }
  
  &.sticky {
    position: sticky;
  }
}

.header {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  background-image: linear-gradient(to bottom right, lightcyan 20%, darkorchid 90%);
  padding: 1rem 2rem;
  pointer-events: all;
}

.header--alpha {
  padding-bottom: 2rem;
  transition: .225s ease-out;
  
  .sticky & {
    opacity: .5;
    transform: translateY(-100%);
    transition: none;
  }
}

.header--beta {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  opacity: .5;
  transform: translateY(-100%);
  
  .sticky & {
    opacity: 1;
    transform: translateY(0);
    transition: .35s ease-out;
  }
}

article {
  padding: 6rem 2rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: darken(gray, 25%);

  h1,
  h4,
  h5,
  p {
    margin-bottom: 1em;
  }
}

            
          
!
            
              const $realSticky = document.querySelector("header");
const $fakeSticky = document.querySelector(".fake-header");

const stickyHeader = () => function() {
  const sr1 = $fakeSticky.getBoundingClientRect();
  const sr2 = $realSticky.getBoundingClientRect();

  if (sr1.top > 0) {
    $realSticky.classList.remove("sticky");
    $fakeSticky.style.top = 0;
  } else {
    $realSticky.classList.add("sticky");
    $fakeSticky.style.top = `-${sr2.height + 1}px`;
  }
};

window.addEventListener("scroll", _.debounce(stickyHeader(), 15));

            
          
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