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HTML

              
                <div id="root"></div>
              
            
!

CSS

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

:root {
	--dark: #1d1d1d;
	--light: #fff;
	--green: #28a92b;
}

body {
	background-color: var(--dark);
	color: var(--light);
	font-family: "Signika Negative", sans-serif;
	margin: 0;
  padding: 0;
  height: 100vh;
  
}

.box {
	width: 250px;
	height: 250px;
  border-radius: 12px;
	display: flex;
	align-items: center;
	justify-content: center;
	text-align: center;
	background-color: var(--green);
	font-weight: 600;
	color: var(--light);
    margin:0 20px 0 0 ;
}

.App {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  overflow-x: hidden;
}

.boxes{
  display:flex;
  width: 150%;

}



              
            
!

JS

              
                const { useEffect, useRef } = React;

function App() {
  
  let colorPicker = gsap.utils.wrap(["#f38630", "#6fb936", "#ccc", "#6fb936"]),
      prevButton = useRef(),
      nextButton = useRef(),
      root = useRef(),
      boxesRef = useRef(),
      s = gsap.utils.selector(root);
  
  useEffect(()=>{
    let boxes = s(".box"),
        speedTween, loop;
    
    function build() {
      let progress = loop ? loop.progress() : 0; // record the current progress so we can revert there (make it look seamless)
      loop && loop.progress(0).kill(); // on resize, we need to kill the old one and rebuild
      loop = horizontalLoop(boxes, {
        paused: true,
        repeat: -1,
        paddingRight: boxes[1].getBoundingClientRect().left - boxes[0].getBoundingClientRect().right
      });
      loop.progress(progress);
      loop.play();
    }
    build();
    window.addEventListener("resize", build);
    
    // alters the timeScale of the loop (negative is reverse)
    function speed(value, duration=1) {
      speedTween && speedTween.kill(); // avoid conflicts
      speedTween = gsap.to(loop, {timeScale: value, duration: duration});
    }
    
      boxesRef.current.addEventListener("mouseenter", () => {
        speed(0, 0.2);
        //disableScroll.on();// disable the scroll for the body to only scroll the slider
      });
      boxesRef.current.addEventListener("mouseleave", () => {
        speed(1);
        //disableScroll.off();
      });
    
    // we can reuse a delayedCall with a delay of 1 second to slow things down. That way, we can simply restart(true) to start the countdown over again.
    let slowDown = gsap.delayedCall(1, () => speed(0)).pause();
    
    boxesRef.current.addEventListener("wheel", (event) => {
      speedTween && speedTween.pause(); // if it's in the middle of speeding up or slowing down, we should pause that tween because we're gonna set it directly...
      loop.timeScale(event.deltaY);
      slowDown.restart(true); // restart the countdown timer to slow down after 1 second.
    });
  } , [])
  return (
    <div className="App" ref={root}>
      <div className="boxes" ref={boxesRef}>
        <div class="box">1</div>
          <div class="box">2</div>
          <div class="box">3</div>
          <div class="box">4</div>
          <div class="box">5</div>
          <div class="box">6</div>
          <div class="box">7</div>
          <div class="box">8</div>
          <div class="box">9</div>
          <div class="box">10</div>
      </div>

    </div>
  );
}

ReactDOM.render(<App />, document.querySelector("#root"));


function horizontalLoop(items, config) {
	items = gsap.utils.toArray(items);
	config = config || {};
	let tl = gsap.timeline({repeat: config.repeat, paused: config.paused, defaults: {ease: "none"}, onReverseComplete: () => tl.totalTime(tl.rawTime() + tl.duration() * 100)}),
		length = items.length,
		startX = items[0].offsetLeft,
		times = [],
		widths = [],
		xPercents = [],
		curIndex = 0,
		pixelsPerSecond = (config.speed || 1) * 200,
		snap = config.snap === false ? v => v : gsap.utils.snap(config.snap || 1), // some browsers shift by a pixel to accommodate flex layouts, so for example if width is 20% the first element's width might be 242px, and the next 243px, alternating back and forth. So we snap to 5 percentage points to make things look more natural
		totalWidth, curX, distanceToStart, distanceToLoop, item, i;
	gsap.set(items, { // convert "x" to "xPercent" to make things responsive, and populate the widths/xPercents Arrays to make lookups faster.
		xPercent: (i, el) => {
			let w = widths[i] = parseFloat(gsap.getProperty(el, "width", "px"));
			xPercents[i] = snap(parseFloat(gsap.getProperty(el, "x", "px")) / w * 100 + gsap.getProperty(el, "xPercent"));
			return xPercents[i];
		}
	});
	gsap.set(items, {x: 0});
	totalWidth = items[length-1].offsetLeft + xPercents[length-1] / 100 * widths[length-1] - startX + items[length-1].offsetWidth * gsap.getProperty(items[length-1], "scaleX") + (parseFloat(config.paddingRight) || 0);
	for (i = 0; i < length; i++) {
		item = items[i];
		curX = xPercents[i] / 100 * widths[i];
		distanceToStart = item.offsetLeft + curX - startX;
		distanceToLoop = distanceToStart + widths[i] * gsap.getProperty(item, "scaleX");
		tl.to(item, {xPercent: snap((curX - distanceToLoop) / widths[i] * 100), duration: distanceToLoop / pixelsPerSecond}, 0)
		  .fromTo(item, {xPercent: snap((curX - distanceToLoop + totalWidth) / widths[i] * 100)}, {xPercent: xPercents[i], duration: (curX - distanceToLoop + totalWidth - curX) / pixelsPerSecond, immediateRender: false}, distanceToLoop / pixelsPerSecond)
		  .add("label" + i, distanceToStart / pixelsPerSecond);
		times[i] = distanceToStart / pixelsPerSecond;
	}
	function toIndex(index, vars) {
		vars = vars || {};
		(Math.abs(index - curIndex) > length / 2) && (index += index > curIndex ? -length : length); // always go in the shortest direction
		let newIndex = gsap.utils.wrap(0, length, index),
			time = times[newIndex];
		if (time > tl.time() !== index > curIndex) { // if we're wrapping the timeline's playhead, make the proper adjustments
			vars.modifiers = {time: gsap.utils.wrap(0, tl.duration())};
			time += tl.duration() * (index > curIndex ? 1 : -1);
		}
		curIndex = newIndex;
		vars.overwrite = true;
		return tl.tweenTo(time, vars);
	}
	tl.next = vars => toIndex(curIndex+1, vars);
	tl.previous = vars => toIndex(curIndex-1, vars);
	tl.current = () => curIndex;
	tl.toIndex = (index, vars) => toIndex(index, vars);
	tl.times = times;
	tl.progress(1, true).progress(0, true); // pre-render for performance
	if (config.reversed) {
	  tl.vars.onReverseComplete();
	  tl.reverse();
	}
	return tl;
}

              
            
!
999px

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