How TO – Slideshow

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

Slideshow / Carousel

A slideshow is used to cycle through elements:

1 / 4

Caption Text

2 / 4

Caption Two

3 / 4

Caption Three

4 / 4

Caption Four

❮
❯

Create A Slideshow

Step 1) Add HTML:

Example

<!– Slideshow container –>
<div class=”slideshow-container”>

  <!– Full-width images with number and caption text –>
  <div class=”mySlides fade”>
   
<div class=”numbertext”>1 / 3</div>
    <img src=”img1.jpg”
style=”width:100%”>
    <div class=”text”>Caption
Text</div>
  </div>

  <div class=”mySlides fade”>
   
<div class=”numbertext”>2 / 3</div>
    <img src=”img2.jpg”
style=”width:100%”>
    <div class=”text”>Caption
Two</div>
  </div>

  <div class=”mySlides fade”>
   
<div class=”numbertext”>3 / 3</div>
    <img src=”img3.jpg”
style=”width:100%”>
    <div class=”text”>Caption
Three</div>
  </div>

  <!– Next and previous
buttons –>
  <a class=”prev” onclick=”plusSlides(-1)”>❮</a>
 
<a class=”next” onclick=”plusSlides(1)”>❯</a>
</div>
<br>

<!– The dots/circles –>
<div style=”text-align:center”>
  <span class=”dot” onclick=”currentSlide(1)”></span>

  <span class=”dot” onclick=”currentSlide(2)”></span>
 
<span class=”dot” onclick=”currentSlide(3)”></span>
</div>

Step 2) Add CSS:

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

Example

* {box-sizing:border-box}

/* Slideshow container */
.slideshow-container {
  max-width: 1000px;
  position:
relative;
  margin: auto;
}

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

/* Next & previous buttons */
.prev, .next {
 
cursor: pointer;
  position: absolute;
 
top: 50%;
  width: auto;
  margin-top: -22px;
  padding: 16px;
  color:
white;
  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);
}

/* 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 {
  color: #f2f2f2;
  font-size:
12px;
  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 {
  animation-name:
fade;
  animation-duration: 1.5s;
}

@keyframes
fade {
  from {opacity: .4}
  to {opacity: 1}
}

Step 3) Add JavaScript:

Example

let slideIndex = 1;
showSlides(slideIndex);

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

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

function showSlides(n) {
 
let i;
  let slides = document.getElementsByClassName(“mySlides”);
 
let dots = document.getElementsByClassName(“dot”);
  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”;
}

Try it Yourself »

Automatic Slideshow

To display an automatic slideshow, use the following code:

Example

let slideIndex = 0;
showSlides();

function showSlides() {
  let i;
  let slides = document.getElementsByClassName(“mySlides”);
 
for (i = 0; i < slides.length; i++) {
   
slides[i].style.display = “none”;
  }
  slideIndex++;
  if (slideIndex > slides.length) {slideIndex
= 1}
  slides[slideIndex-1].style.display = “block”;

  setTimeout(showSlides, 2000); // Change image every 2
seconds
}

Try it Yourself »

Multiple Slideshows

Example

let slideIndex = [1,1];
/* Class the members of each slideshow group with
different CSS classes */
let slideId = [“mySlides1”, “mySlides2”]
showSlides(1, 0);
showSlides(1, 1);

function plusSlides(n, no) {
 
showSlides(slideIndex[no] += n, no);
}

function showSlides(n, no) {
 
let i;
  let x = document.getElementsByClassName(slideId[no]);
 
if (n > x.length) {slideIndex[no] = 1}
  if (n < 1) {slideIndex[no] =
x.length}
  for (i = 0; i < x.length; i++) {
   
x[i].style.display = “none”;
  }
  x[slideIndex[no]-1].style.display
= “block”;
}

Try it Yourself »

Tip: Also check out How To – Slideshow Gallery and How To – Lightbox.