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CSS

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CSS Base

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <html>
  <head>
    <meta charset="utf-8">
    <title>Slideshow</title>
    <link href="https://use.fontawesome.com/releases/v5.0.8/css/all.css" rel="stylesheet">
  </head>
  <body>
    <div class="container">
      <div class="arrow arrow-left"><i class="fas fa-chevron-circle-left"></i></div>
      <img src="https://images.unsplash.com/photo-1518640027989-a30d5d7e498e?ixlib=rb-0.3.5&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ&s=f9575732a498c98486879d7000ab1d47" alt="">
      <img src="https://images.unsplash.com/photo-1505843378597-b96befae716e?ixlib=rb-0.3.5&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ&s=9e69634f39ec7c08514fef902cfc85ac" alt="">
      <img src="https://images.unsplash.com/photo-1471138406156-7a89e687a062?ixlib=rb-0.3.5&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ&s=7820fc816715b37942a793360b785c60" alt="">
      <div class="arrow arrow-right"><i class="fas fa-chevron-circle-right"></i>
      </div>
      <div class="dots">
        <div class="dot">
          <i class="far fa-dot-circle"></i>
        </div>
        <div class="dot">
          <i class="far fa-circle"></i>
        </div>
        <div class="dot">
          <i class="far fa-circle"></i>
        </div>
      </div>
    </div>
  </body>
</html>
!

CSS 

              
                @mixin default($margin, $padding, $box-sizing) {
  margin: $margin;
  padding: $padding;
  box-sizing: $box-sizing;
}

@mixin dimension($width: auto, $height: auto) {
  width: $width;
  height: $height;
}

@mixin pos($position: absolute, $margin: auto, $top: auto, $bottom: auto, $left: auto, $right: auto) {
  position: $position;
  margin: $margin;
  top: $top;
  bottom: $bottom;
  left: $left;
  right: $right;
}

$color: cornsilk;

* {
  @include default(0, 0, border-box);
}

body, html {
  @include dimension(100%, 100%);
}

  .container {
    @include dimension(100%, 100%);
    position: relative;
    background: #355C7D;  /* fallback for old browsers */
    background: -webkit-linear-gradient(to right, #C06C84,   #6C5B7B, #355C7D);  /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(to right, #C06C84,           #6C5B7B, #355C7D); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
    overflow: hidden;
    img {
      @include dimension(100%, 100%);
      object-fit: cover;
      @include pos($top: 0, $bottom: 0, $left: 0, $right: 0);
      animation: fade 1s;
    }
    .arrow {
      z-index: 10;
      @include pos($top: 0, $bottom: 0);
      @include dimension(1.5rem, 1.5rem);
      font-size: 1.5rem;
      color: $color;
      opacity: 0.5;
      transition: opacity 1s;
      &:hover {
        cursor: pointer;
        opacity: 1;
      }
    }
    .arrow-left {
      left: 2%;
    }
    .arrow-right {
      right: 2%;
    }
    .dots {
      @include pos($left: 0, $right: 0, $bottom: 2%);
      @include dimension(7rem);
      z-index: 5;
      .dot {
        @include dimension(2rem, 2rem);
        display: inline-flex;
        align-content: center;
        justify-content: center;
        color: $color;
      }
    }
  }

@keyframes fade {
  from {opacity: 0.1}
  to {opacity: 1}
}
!

JS 

              
                const imgs = document.querySelectorAll(".container img");
const dots = document.querySelectorAll(".dot i");
const leftArrow = document.querySelector(".arrow-left");
const rightArrow = document.querySelector(".arrow-right");

let currentIndex = 0;
let time = 5000; // default time for auto slideshow

const defClass = (startPos, index) => {
  for (let i = startPos; i < imgs.length; i++) {
    imgs[i].style.display = "none";
    dots[i].classList.remove("fa-dot-circle");
    dots[i].classList.add("fa-circle");
  }
  imgs[index].style.display = "block";
  dots[index].classList.add("fa-dot-circle");
};

defClass(1, 0);

leftArrow.addEventListener("click", function(){
  currentIndex <= 0 ? currentIndex = imgs.length-1 : currentIndex--;
  defClass(0, currentIndex);
});

rightArrow.addEventListener("click", function(){
  currentIndex >= imgs.length-1 ? currentIndex = 0 : currentIndex++;
  defClass(0, currentIndex);
});

const startAutoSlide = () => {
  setInterval(() => {
    currentIndex >= imgs.length-1 ? currentIndex = 0 : currentIndex++;
    defClass(0, currentIndex);
  }, time);
};

startAutoSlide(); // Start the slideshow
!
999px

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