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HTML

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About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

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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

About CSS Base

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JavaScript

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HTML 

              
                <section class="page">
  <div class="page__wrapper">
    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>

    <div class="card">
      <p class="card__tags">CSS | ANIMATION | LERP</p>
      <div>
        <h3 class="card__title">Smooth Scroll Example With AnimationFrame & Linear Interpolation</h3>
        <p class="card__desc">24th December, 2021</p>
      </div>
    </div>
  </div>
</section>
!

CSS 

              
                html {
  position: fixed;
  inset: 0;
  overflow: hidden;
}

body {
  background: #fff;
  color: #a8a0a0;
  color: #333333;
  font-family: "system-ui";
}

.page {
  width: 100%;
  /*   height: calc(100vh - 1rem); */
  position: relative;
  /*   background-color: #333333; */
  background-color: #fff;
  position: abosolute;
/*   overflow: hidden; */
}

.page__wrapper {
  padding: 4rem 2rem;
}

.card {
  width: 600px;
  height: 450px;
  margin: auto;
  box-shadow: 0 0 25px 1px rgba(0, 0, 0, 0.1);
  padding: 4rem;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card:not(:last-of-type) {
  margin-bottom: 5rem;
}

.card__tags {
  font-size: 0.8rem;
  font-weight: 500;
  margin: 0;
}

.card__title {
  font-size: 1.7rem;
  margin: 0;
  max-width: 70%;
  font-weight: 600;
  line-height: 1.3;
}

.card__desc {
  margin: 2rem 0 0;
  opacity: 0.7;
  font-size: 0.85rem;
}
!

JS 

              
                // store components in variables
const page = document.querySelector(".page");
const wrapper = document.querySelector(".page__wrapper");

// ease value to be used in interpolation
const ease = 0.05; // 20%

// create an object to store scroll details
const scroll = {
  current: 0, // current scroll position
  target: 0, // target scroll position
  limit: 0 // limit of scroll
};

// function to update target scroll position
const updateTarget = (e) => {
  // set the target value to deltaY
  // which is distance covered by mouseWheel
  scroll.target += e.deltaY;
};

// create an event listener to listen for mouse-wheel
document.addEventListener("mousewheel", updateTarget);

// linear interpolation function
const lerp = (current, target) => {
  // get distance between current & target scroll points
  const distanceBetween = target - current;

  // get a percentage of that distance, in this case 20%
  const distanceToTravel = distanceBetween * ease;

  // add the % distance to the current scroll value
  return current + distanceToTravel;

  // shorthand for lerp is
  // current = current + ((target - current) * ease)
};

// clamping function to limit mousewheel values
const clamp = (min, max, value) => {
  const clamped = Math.min(Math.max(value, min), max);
  return clamped;
};

// main scroll function
const smoothScroll = () => {
  const maxScroll = wrapper.clientHeight - window.innerHeight;
  // clamp scroll target value
  scroll.target = clamp(0, maxScroll, scroll.target);

  const { current, target } = scroll;

  const transition = lerp(current, target);
  scroll.current = transition;

  // translate page wrapper based on lerped value
  wrapper.style.transform = `translateY(-${scroll.current}px)`;

  // use requestAnimationFrame with callback
  // to create an infinite loop of this function
  // that updates 60 times per second
  // or 30 times per second
  // depending on browser refresh rate
  window.requestAnimationFrame(smoothScroll);
};

// call smoothScroll to start loop
smoothScroll();
!
999px

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