Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

+ add another resource

JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Behavior

Auto Save

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <section class="section blue">
  <h1>FIRST REGULAR SCROLL SECTION</h1>
</section>
<section class="section observer-section">
  <div class="slide red">
    <h1>FIRST PANEL</h1>
    <h1>FIRST OBSERVER SECTION</h1>
  </div>
  <div class="slide green">
    <h1>SECOND PANEL</h1>
    <h1>FIRST OBSERVER SECTION</h1>
  </div>
  <div class="slide purple">
    <h1>THIRD PANEL</h1>
    <h1>FIRST OBSERVER SECTION</h1>
  </div>
  <div class="slide gray">
    <h1>FOURTH PANEL</h1>
    <h1>FIRST OBSERVER SECTION</h1>
  </div>
</section>
<section class="section blue">
  <h1>SECOND REGULAR SCROLL SECTION</h1>
</section>
<section class="section observer-section">
  <div class="slide purple">
    <h1>FIRST PANEL</h1>
    <h1>SECOND OBSERVER SECTION</h1>
  </div>
  <div class="slide green">
    <h1>SECOND PANEL</h1>
    <h1>SECOND OBSERVER SECTION</h1>
  </div>
  <div class="slide gray">
    <h1>THIRD PANEL</h1>
    <h1>SECOND OBSERVER SECTION</h1>
  </div>
  <div class="slide red">
    <h1>FOURTH PANEL</h1>
    <h1>SECOND OBSERVER SECTION</h1>
  </div>
</section>
<section class="section blue">
  <h1>THIRD REGULAR SCROLL SECTION</h1>
</section>
              
            
!

CSS

              
                @import url("https://fonts.googleapis.com/css2?family=Signika+Negative:wght@400;600&display=swap");

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Signika Negative", sans-serif, Arial;
  color: white;
}

h1 {
  font-size: 30px;
  margin: 0;
}

.section {
  width: 100%;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.gray {
  background-color: #777;
  background-image: radial-gradient(
      circle at 47% 14%,
      rgba(205, 205, 205, 0.04) 0%,
      rgba(205, 205, 205, 0.04) 43%,
      transparent 43%,
      transparent 100%
    ),
    radial-gradient(
      circle at 35% 12%,
      rgba(215, 215, 215, 0.04) 0%,
      rgba(215, 215, 215, 0.04) 4%,
      transparent 4%,
      transparent 100%
    ),
    radial-gradient(
      circle at 1% 35%,
      rgba(24, 24, 24, 0.04) 0%,
      rgba(24, 24, 24, 0.04) 37%,
      transparent 37%,
      transparent 100%
    ),
    radial-gradient(
      circle at 21% 1%,
      rgba(0, 0, 0, 0.04) 0%,
      rgba(0, 0, 0, 0.04) 26%,
      transparent 26%,
      transparent 100%
    ),
    radial-gradient(
      circle at 23% 82%,
      rgba(249, 249, 249, 0.04) 0%,
      rgba(249, 249, 249, 0.04) 60%,
      transparent 60%,
      transparent 100%
    ),
    radial-gradient(
      circle at 11% 54%,
      rgba(251, 251, 251, 0.04) 0%,
      rgba(251, 251, 251, 0.04) 23%,
      transparent 23%,
      transparent 100%
    ),
    radial-gradient(
      circle at 69% 68%,
      rgba(234, 234, 234, 0.04) 0%,
      rgba(234, 234, 234, 0.04) 10%,
      transparent 10%,
      transparent 100%
    ),
    linear-gradient(90deg, #777, #606060);
}

.blue {
  background-color: #2c7ad2;
  background-image: radial-gradient(
      circle at 47% 14%,
      rgba(205, 205, 205, 0.04) 0%,
      rgba(205, 205, 205, 0.04) 43%,
      transparent 43%,
      transparent 100%
    ),
    radial-gradient(
      circle at 35% 12%,
      rgba(215, 215, 215, 0.04) 0%,
      rgba(215, 215, 215, 0.04) 4%,
      transparent 4%,
      transparent 100%
    ),
    radial-gradient(
      circle at 1% 35%,
      rgba(24, 24, 24, 0.04) 0%,
      rgba(24, 24, 24, 0.04) 37%,
      transparent 37%,
      transparent 100%
    ),
    radial-gradient(
      circle at 21% 1%,
      rgba(0, 0, 0, 0.04) 0%,
      rgba(0, 0, 0, 0.04) 26%,
      transparent 26%,
      transparent 100%
    ),
    radial-gradient(
      circle at 23% 82%,
      rgba(249, 249, 249, 0.04) 0%,
      rgba(249, 249, 249, 0.04) 60%,
      transparent 60%,
      transparent 100%
    ),
    radial-gradient(
      circle at 11% 54%,
      rgba(251, 251, 251, 0.04) 0%,
      rgba(251, 251, 251, 0.04) 23%,
      transparent 23%,
      transparent 100%
    ),
    radial-gradient(
      circle at 69% 68%,
      rgba(234, 234, 234, 0.04) 0%,
      rgba(234, 234, 234, 0.04) 10%,
      transparent 10%,
      transparent 100%
    ),
    linear-gradient(90deg, #2c7ad2, #1568c6);
}

.orange {
  background-color: #e77614;
  background-image: radial-gradient(
      circle at 46% 40%,
      rgba(228, 228, 228, 0.06) 0%,
      rgba(228, 228, 228, 0.06) 13%,
      transparent 13%,
      transparent 100%
    ),
    radial-gradient(
      circle at 11% 41%,
      rgba(198, 198, 198, 0.06) 0%,
      rgba(198, 198, 198, 0.06) 19%,
      transparent 19%,
      transparent 100%
    ),
    radial-gradient(
      circle at 52% 23%,
      rgba(14, 14, 14, 0.06) 0%,
      rgba(14, 14, 14, 0.06) 69%,
      transparent 69%,
      transparent 100%
    ),
    radial-gradient(
      circle at 13% 85%,
      rgba(148, 148, 148, 0.06) 0%,
      rgba(148, 148, 148, 0.06) 44%,
      transparent 44%,
      transparent 100%
    ),
    radial-gradient(
      circle at 57% 74%,
      rgba(232, 232, 232, 0.06) 0%,
      rgba(232, 232, 232, 0.06) 21%,
      transparent 21%,
      transparent 100%
    ),
    radial-gradient(
      circle at 59% 54%,
      rgba(39, 39, 39, 0.06) 0%,
      rgba(39, 39, 39, 0.06) 49%,
      transparent 49%,
      transparent 100%
    ),
    radial-gradient(
      circle at 98% 38%,
      rgba(157, 157, 157, 0.06) 0%,
      rgba(157, 157, 157, 0.06) 24%,
      transparent 24%,
      transparent 100%
    ),
    radial-gradient(
      circle at 8% 6%,
      rgba(60, 60, 60, 0.06) 0%,
      rgba(60, 60, 60, 0.06) 12%,
      transparent 12%,
      transparent 100%
    ),
    linear-gradient(90deg, #ff7600, #ff7600);
}

.red {
  background-color: #c82736;
  background-image: radial-gradient(
      circle at 19% 90%,
      rgba(190, 190, 190, 0.04) 0%,
      rgba(190, 190, 190, 0.04) 17%,
      transparent 17%,
      transparent 100%
    ),
    radial-gradient(
      circle at 73% 2%,
      rgba(78, 78, 78, 0.04) 0%,
      rgba(78, 78, 78, 0.04) 94%,
      transparent 94%,
      transparent 100%
    ),
    radial-gradient(
      circle at 45% 2%,
      rgba(18, 18, 18, 0.04) 0%,
      rgba(18, 18, 18, 0.04) 55%,
      transparent 55%,
      transparent 100%
    ),
    radial-gradient(
      circle at 76% 60%,
      rgba(110, 110, 110, 0.04) 0%,
      rgba(110, 110, 110, 0.04) 34%,
      transparent 34%,
      transparent 100%
    ),
    radial-gradient(
      circle at 68% 56%,
      rgba(246, 246, 246, 0.04) 0%,
      rgba(246, 246, 246, 0.04) 16%,
      transparent 16%,
      transparent 100%
    ),
    radial-gradient(
      circle at 71% 42%,
      rgba(156, 156, 156, 0.04) 0%,
      rgba(156, 156, 156, 0.04) 47%,
      transparent 47%,
      transparent 100%
    ),
    radial-gradient(
      circle at 46% 82%,
      rgba(247, 247, 247, 0.04) 0%,
      rgba(247, 247, 247, 0.04) 39%,
      transparent 39%,
      transparent 100%
    ),
    radial-gradient(
      circle at 50% 47%,
      rgba(209, 209, 209, 0.04) 0%,
      rgba(209, 209, 209, 0.04) 45%,
      transparent 45%,
      transparent 100%
    ),
    linear-gradient(90deg, #e53949, #cc2232);
}

.purple {
  background-color: #8d3dae;
  background-image: radial-gradient(
      circle at 47% 14%,
      rgba(205, 205, 205, 0.04) 0%,
      rgba(205, 205, 205, 0.04) 43%,
      transparent 43%,
      transparent 100%
    ),
    radial-gradient(
      circle at 35% 12%,
      rgba(215, 215, 215, 0.04) 0%,
      rgba(215, 215, 215, 0.04) 4%,
      transparent 4%,
      transparent 100%
    ),
    radial-gradient(
      circle at 1% 35%,
      rgba(24, 24, 24, 0.04) 0%,
      rgba(24, 24, 24, 0.04) 37%,
      transparent 37%,
      transparent 100%
    ),
    radial-gradient(
      circle at 21% 1%,
      rgba(0, 0, 0, 0.04) 0%,
      rgba(0, 0, 0, 0.04) 26%,
      transparent 26%,
      transparent 100%
    ),
    radial-gradient(
      circle at 23% 82%,
      rgba(249, 249, 249, 0.04) 0%,
      rgba(249, 249, 249, 0.04) 60%,
      transparent 60%,
      transparent 100%
    ),
    radial-gradient(
      circle at 11% 54%,
      rgba(251, 251, 251, 0.04) 0%,
      rgba(251, 251, 251, 0.04) 23%,
      transparent 23%,
      transparent 100%
    ),
    radial-gradient(
      circle at 69% 68%,
      rgba(234, 234, 234, 0.04) 0%,
      rgba(234, 234, 234, 0.04) 10%,
      transparent 10%,
      transparent 100%
    ),
    linear-gradient(90deg, #8d3dae, #8d3dae);
}

.green {
  background-color: #28a92b;
  background-image: radial-gradient(
      circle at 46% 40%,
      rgba(228, 228, 228, 0.06) 0%,
      rgba(228, 228, 228, 0.06) 13%,
      transparent 13%,
      transparent 100%
    ),
    radial-gradient(
      circle at 11% 41%,
      rgba(198, 198, 198, 0.06) 0%,
      rgba(198, 198, 198, 0.06) 19%,
      transparent 19%,
      transparent 100%
    ),
    radial-gradient(
      circle at 52% 23%,
      rgba(14, 14, 14, 0.06) 0%,
      rgba(14, 14, 14, 0.06) 69%,
      transparent 69%,
      transparent 100%
    ),
    radial-gradient(
      circle at 13% 85%,
      rgba(148, 148, 148, 0.06) 0%,
      rgba(148, 148, 148, 0.06) 44%,
      transparent 44%,
      transparent 100%
    ),
    radial-gradient(
      circle at 57% 74%,
      rgba(232, 232, 232, 0.06) 0%,
      rgba(232, 232, 232, 0.06) 21%,
      transparent 21%,
      transparent 100%
    ),
    radial-gradient(
      circle at 59% 54%,
      rgba(39, 39, 39, 0.06) 0%,
      rgba(39, 39, 39, 0.06) 49%,
      transparent 49%,
      transparent 100%
    ),
    radial-gradient(
      circle at 98% 38%,
      rgba(157, 157, 157, 0.06) 0%,
      rgba(157, 157, 157, 0.06) 24%,
      transparent 24%,
      transparent 100%
    ),
    radial-gradient(
      circle at 8% 6%,
      rgba(60, 60, 60, 0.06) 0%,
      rgba(60, 60, 60, 0.06) 12%,
      transparent 12%,
      transparent 100%
    ),
    linear-gradient(90deg, #28a92b, #10a614);
}

              
            
!

JS

              
                console.clear();

gsap.registerPlugin(ScrollTrigger);

const observerSections = gsap.utils.toArray(".observer-section");
let allowScroll = true;
const scrollTimeout = gsap.delayedCall(1, () => (allowScroll = true)).pause();
let currentSection = 0;
const sectionIndices = [0, 0];
const sectionsPanels = [];
const sectionsLimits = [];

const gotoPanel = (index, isScrollingDown) => {
  const limit = sectionsLimits[currentSection];
  if (
    (index === limit && isScrollingDown) ||
    (index === -1 && !isScrollingDown)
  ) {
    intentObserver.disable(); // resume native scroll
    return;
  }
  allowScroll = false;
  scrollTimeout.restart(true);
  const target = isScrollingDown
    ? sectionsPanels[currentSection][sectionIndices[currentSection]]
    : sectionsPanels[currentSection][index];
  gsap.to(target, {
    yPercent: isScrollingDown ? -100 : 0,
    duration: 0.75
  });
  sectionIndices[currentSection] = index;
};

const intentObserver = ScrollTrigger.observe({
  type: "wheel,touch",
  onUp: () =>
    allowScroll && gotoPanel(sectionIndices[currentSection] - 1, false),
  onDown: () =>
    allowScroll && gotoPanel(sectionIndices[currentSection] + 1, true),
  tolerance: 10,
  preventDefault: true,
  onEnable(self) {
    allowScroll = false;
    scrollTimeout.restart(true);
    // when enabling, we should save the scroll position and freeze it. This fixes momentum-scroll on Macs, for example.
    let savedScroll = self.scrollY();
    self._restoreScroll = () => self.scrollY(savedScroll); // if the native scroll repositions, force it back to where it should be
    document.addEventListener("scroll", self._restoreScroll, {
      passive: false
    });
  },
  onDisable: (self) =>
    document.removeEventListener("scroll", self._restoreScroll)
});
intentObserver.disable();

observerSections.forEach((section, i) => {
  const panels = gsap.utils.toArray(".slide", section);
  sectionsPanels[i] = panels;
  sectionsLimits[i] = panels.length;

  gsap.set(panels, { zIndex: (j) => panels.length - j });

  ScrollTrigger.create({
    trigger: section,
    start: "top top",
    end: "+=200",
    pin: true,
    onEnter: (self) => {
      if (intentObserver.isEnabled) {
        return;
      } // in case the native scroll jumped past the end and then we force it back to where it should be.
      self.scroll(self.start + 1); // jump to just one pixel past the start of this section so we can hold there.
      intentObserver.enable(); // STOP native scrolling
      currentSection = i;
    },
    onEnterBack: (self) => {
      if (intentObserver.isEnabled) {
        return;
      } // in case the native scroll jumped backward past the start and then we force it back to where it should be.
      self.scroll(self.end - 1); // jump to one pixel before the end of this section so we can hold there.
      intentObserver.enable(); // STOP native scrolling
      currentSection = i;
    }
    // id: "sec-" + (1 + i),
    // markers: {
    //   indent: 200 * i,
    //   startColor: "#eee",
    //   endColor: "#eee",
    // }
  });
});

              
            
!
999px

Console