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How TO - Slideshow Gallery

Learn how to create a responsive slideshow gallery with CSS and JavaScript.

Slideshow Gallery

A slideshow is used to cycle through elements:

1 / 6
2 / 6
3 / 6
4 / 6
5 / 6
6 / 6

The Woods
Trolltunga, Norway
Mountains and fjords
Northern Lights
Nature and sunrise
Snowy Mountains

Try it Yourself »

Create A Slideshow Gallery

Step 1) Add HTML:


<!-- Container for the image gallery -->
<div class="container">

  <!-- Full-width images with number text -->
  <div class="mySlides">
    <div class="numbertext">1 / 6</div>
      <img src="img_woods_wide.jpg" style="width:100%">

  <div class="mySlides">
    <div class="numbertext">2 / 6</div>
      <img src="img_fjords_wide.jpg" style="width:100%">

  <div class="mySlides">
    <div class="numbertext">3 / 6</div>
      <img src="img_mountains_wide.jpg" style="width:100%">

  <div class="mySlides">
    <div class="numbertext">4 / 6</div>
      <img src="img_lights_wide.jpg" style="width:100%">

  <div class="mySlides">
    <div class="numbertext">5 / 6</div>
      <img src="img_nature_wide.jpg" style="width:100%">

  <div class="mySlides">
    <div class="numbertext">6 / 6</div>
      <img src="img_snow_wide.jpg" style="width:100%">

  <!-- Next and previous buttons -->
  <a class="prev" onclick="plusSlides(-1)">&#10094;</a>
  <a class="next" onclick="plusSlides(1)">&#10095;</a>

  <!-- Image text -->
  <div class="caption-container">
    <p id="caption"></p>

  <!-- Thumbnail images -->
  <div class="row">
    <div class="column">
      <img class="demo cursor" src="img_woods.jpg" style="width:100%" onclick="currentSlide(1)" alt="The Woods">
    <div class="column">
      <img class="demo cursor" src="img_fjords.jpg" style="width:100%" onclick="currentSlide(2)" alt="Trolltunga, Norway">
    <div class="column">
      <img class="demo cursor" src="img_mountains.jpg" style="width:100%" onclick="currentSlide(3)" alt="Mountains and fjords">
    <div class="column">
      <img class="demo cursor" src="img_lights.jpg" style="width:100%" onclick="currentSlide(4)" alt="Northern Lights">
    <div class="column">
      <img class="demo cursor" src="img_nature.jpg" style="width:100%" onclick="currentSlide(5)" alt="Nature and sunrise">
    <div class="column">
      <img class="demo cursor" src="img_snow.jpg" style="width:100%" onclick="currentSlide(6)" alt="Snowy Mountains">

Step 2) Add CSS:

Style the image gallery, next and previous buttons, the caption text and the dots:


* {
  box-sizing: border-box;

/* Position the image container (needed to position the left and right arrows) */
.container {
  position: relative;

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

/* Add a pointer when hovering over the thumbnail images */
.cursor {
  cursor: pointer;

/* Next & previous buttons */
.next {
  cursor: pointer;
  position: absolute;
  top: 40%;
  width: auto;
  padding: 16px;
  margin-top: -50px;
  color: white;
  font-weight: bold;
  font-size: 20px;
  border-radius: 0 3px 3px 0;
  user-select: none;
  -webkit-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 */
.next:hover {
  background-color: rgba(0, 0, 0, 0.8);

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

/* Remove bottom margin. Needed for some browsers */
img {
  margin-bottom: -4px;

/* Container for image text */
.caption-container {
  text-align: center;
  background-color: #222;
  padding: 2px 16px;
  color: white;

.row:after {
  content: "";
  display: table;
  clear: both;

/* Six columns side by side */
.column {
  float: left;
  width: 16.66%;

/* Add a transparency effect for thumnbail images */
.demo {
  opacity: 0.6;

.demo:hover {
  opacity: 1;

Step 3) Add JavaScript:


var slideIndex = 1;

// Next/previous controls
function plusSlides(n) {
  showSlides(slideIndex += n);

// Thumbnail image controls
function currentSlide(n) {
  showSlides(slideIndex = n);

function showSlides(n) {
  var i;
  var slides = document.getElementsByClassName("mySlides");
  var dots = document.getElementsByClassName("demo");
  var captionText = document.getElementById("caption");
  if (n > slides.length) {slideIndex = 1}
  if (n < 1) {slideIndex = slides.length}
  for (i = 0; i < slides.length; i++) {
    slides[i].style.display = "none";
  for (i = 0; i < dots.length; i++) {
    dots[i].className = dots[i].className.replace(" active", "");
  slides[slideIndex-1].style.display = "block";
  dots[slideIndex-1].className += " active";
  captionText.innerHTML = dots[slideIndex-1].alt;
Try it Yourself »