Carousel component to use inside your React, Gatsby projects. An example can be found on https://johanaltamar.com/portfolio/delivree

Carousel.css

* {
  box-sizing: border-box;
}

/* Slideshow container */
.slideshow-container {
  position: relative;
  margin: auto;
}

.slideshow-container .text {
  width: 100%;
  background-color: rgba(0, 0, 0, 0.8);
}

.slideshow-container-portrait, .slideshow-container-landscape {
  max-width: 100%;
}

.slideshow-container-portrait img, .slideshow-container-landscape img {
  max-height: 70vh;
  margin: auto;
  border: 1px solid #bbbbbb;
}

@media screen and (min-width: 500px) {
  .slideshow-container-portrait {
    max-width: 75%;
  }
}

@media screen and (min-width: 700px) {
  .slideshow-container-portrait {
    max-width: 60%;
  }
}

@media screen and (min-width: 800px) {
  .slideshow-container-portrait {
    max-width: 50%;
  }
}

/* Hide the images by default */
.mySlides {
  display: none;
}

/* Next & previous buttons */
button {
  border: none;
  background-color: transparent;
}

.prev,
.next {
  cursor: pointer;
  position: absolute;
  top: 50%;
  width: auto;
  margin-top: -22px;
  padding: 16px;
  color: grey;
  font-weight: bold;
  font-size: 18px;
  transition: 0.6s ease;
  border-radius: 0 3px 3px 0;
  user-select: none;
}

/* Position the "next button" to the right */
.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

/* On hover, add a black background color with a little bit see-through */
.prev:hover,
.next:hover {
  background-color: rgba(0, 0, 0, 0.8);
  color: white;
}

/* Caption text */
.text {
  color: #f2f2f2;
  font-size: 15px;
  padding: 8px 12px;
  position: absolute;
  bottom: 8px;
  width: 100%;
  text-align: center;
}

/* Number text (1/3 etc) */
.numbertext {
  background-color: rgba(0, 0, 0, 0.7);
  color: #f2f2f2;
  font-size: 12px;
  font-weight: bold;
  padding: 8px 12px;
  position: absolute;
  top: 0;
}

/* The dots/bullets/indicators */
.dot {
  cursor: pointer;
  height: 15px;
  width: 15px;
  margin: 0 2px;
  background-color: #bbb;
  border-radius: 50%;
  display: inline-block;
  transition: background-color 0.6s ease;
}

.active,
.dot:hover {
  background-color: #717171;
}

/* Fading animation */
.fade {
  -webkit-animation-name: fade;
  -webkit-animation-duration: 1.5s;
  animation-name: fade;
  animation-duration: 1.5s;
}

.block {
  display: flex;
}

.block:not(:last-child) {
  margin-bottom: 0.5rem;
}

.none {
  display: none;
}

@-webkit-keyframes fade {
  from {
    opacity: 0.4;
  }
  to {
    opacity: 1;
  }
}

@keyframes fade {
  from {
    opacity: 0.4;
  }
  to {
    opacity: 1;
  }
}

Carousel.js

import React, { useState } from "react"
import PropTypes from "prop-types"
import "./styles/portfolioProjectCarousel.css"

const Carousel = ({ images, orientation, title }) => {
  const [slideIndex, setSlideIndex] = useState(1)

  const plusSlides = step => {
    setSlideIndex(index => {
      if (index + step > images.length) {
        return 1
      } else if (index + step < 1) {
        return images.length
      }
      return index + step
    })
  }

  const currentSlide = slide => {
    setSlideIndex(slide)
  }

  return (
    <>
      {title && <h4 style={{ padding: "0px 0px 8px 16px" }}>{title}</h4>}
      <div className={`slideshow-container slideshow-container-${orientation}`}>
        {images.map((image, index) => (
          <div
            key={index}
            className={`mySlides fade ${
              slideIndex === index + 1 ? "block" : "none"
            }`}
          >
            <div className="numbertext">
              {index + 1} / {images.length}
            </div>
            <img src={image.url} alt={image.title} />
            <div className="text">{image.title}</div>
          </div>
        ))}

        <button className="prev" onClick={() => plusSlides(-1)}>
          &#10094;
        </button>
        <button className="next" onClick={() => plusSlides(1)}>
          &#10095;
        </button>
      </div>
      <div style={{ textAlign: "center" }}>
        {images.map((image, idx) => (
          <button
            key={idx}
            className={`dot ${slideIndex === idx + 1 ? "active" : undefined}`}
            aria-label={`Image ${idx + 1}`}
            onClick={() => currentSlide(idx + 1)}
          ></button>
        ))}
      </div>
    </>
  )
}

Carousel.propTypes = {
  images: PropTypes.array.isRequired,
  orientation: PropTypes.oneOf(["portrait", "landscape"]).isRequired,
  title: PropTypes.string,
}

export default Carousel