JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
  <ul class="carousel" data-target="carousel">
    <li class="card" data-target="card"><span>1</span></li>
    <li class="card" data-target="card"><span>2</span></li>
    <li class="card" data-target="card"><span>3</span></li>
    <li class="card" data-target="card"><span>4</span></li>
    <li class="card" data-target="card"><span>5</span></li>
    <li class="card" data-target="card"><span>6</span></li>
    <li class="card" data-target="card"><span>7</span></li>
    <li class="card" data-target="card"><span>8</span></li>
    <li class="card" data-target="card"><span>9</span></li>
  </ul>
  <div class="button-wrapper">
    <button data-action="slideLeft">L</button>
    <button data-action="slideRight">R</button>
  </div>
</div>

CSS

.wrapper {
  height: 100px;
  width: 432px;
  position: relative;
  overflow: hidden;
  margin: 0 auto;
}

.button-wrapper {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: absolute;
}

.carousel {
  margin: 0;
  padding: 0;
  list-style: none;
  width: 100%;
  display: flex;
  position: absolute;
  left: 0;
  transition: all 1s ease;
}

.card {
  background: black;
  min-width: 100px;
  height: 100px;
  margin-right: 1rem;
  display: inline-block;
}

span {
  color:#ffffff;
}

JavaScript

// Select the carousel you'll need to manipulate and the buttons you'll add events to
const carousel = document.querySelector("[data-target='carousel']");
const card = carousel.querySelector("[data-target='card']");
const leftButton = document.querySelector("[data-action='slideLeft']");
const rightButton = document.querySelector("[data-action='slideRight']");

// Prepare to limit the direction in which the carousel can slide, 
// and to control how much the carousel advances by each time.
// In order to slide the carousel so that only three cards are perfectly visible each time,
// you need to know the carousel width, and the margin placed on a given card in the carousel
const carouselWidth = carousel.offsetWidth;
const cardStyle = card.currentStyle || window.getComputedStyle(card)
const cardMarginRight = Number(cardStyle.marginRight.match(/\d+/g)[0]);

// Count the number of total cards you have
const cardCount = carousel.querySelectorAll("[data-target='card']").length;

// Define an offset property to dynamically update by clicking the button controls
// as well as a maxX property so the carousel knows when to stop at the upper limit
let offset = 0;
const maxX = -((cardCount / 3) * carouselWidth + 
               (cardMarginRight * (cardCount / 3)) - 
               carouselWidth - cardMarginRight);


// Add the click events
leftButton.addEventListener("click", function() {
  if (offset !== 0) {
    offset += carouselWidth + cardMarginRight;
    carousel.style.transform = `translateX(${offset}px)`;
    }
})
  
rightButton.addEventListener("click", function() {
  if (offset !== maxX) {
    offset -= carouselWidth + cardMarginRight;
    carousel.style.transform = `translateX(${offset}px)`;
  }
})