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How TO – Slideshow
Slideshow / Carousel
A slideshow is used to cycle through elements:
Example
<!DOCTYPE html>
<html>
<head>
<meta name=”viewport” content=”width=device-width, initial-scale=1″>
<style>
* {box-sizing: border-box}
body {font-family: Verdana, sans-serif; margin:0}
.mySlides {display: none}
img {vertical-align: middle;}
/* Slideshow container */
.slideshow-container {
max-width: 1000px;
position: relative;
margin: auto;
}
/* Next & previous buttons */
.prev, .next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
padding: 16px;
margin-top: -22px;
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}
}
/* On smaller screens, decrease text size */
@media only screen and (max-width: 300px) {
.prev, .next,.text {font-size: 11px}
}
</style>
</head>
<body>
<div>
<div>
<div>1 / 3</div>
<img src=”img_nature_wide.jpg” style=”width:100%”>
<div>Caption Text</div>
</div>
<div>
<div>2 / 3</div>
<img src=”img_snow_wide.jpg” style=”width:100%”>
<div>Caption Two</div>
</div>
<div>
<div>3 / 3</div>
<img src=”img_mountains_wide.jpg” style=”width:100%”>
<div>Caption Three</div>
</div>
<a onclick=”plusSlides(-1)”>❮</a>
<a onclick=”plusSlides(1)”>❯</a>
</div>
<br>
<div style=”text-align:center”>
<span onclick=”currentSlide(1)”></span>
<span onclick=”currentSlide(2)”></span>
<span onclick=”currentSlide(3)”></span>
</div>
<script>
let slideIndex = 1;
showSlides(slideIndex);
function plusSlides(n) {
showSlides(slideIndex += n);
}
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”;
}
</script>
</body>
</html>
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
<!DOCTYPE html>
<html>
<head>
<meta name=”viewport” content=”width=device-width, initial-scale=1″>
<style>
* {box-sizing: border-box}
body {font-family: Verdana, sans-serif; margin:0}
.mySlides {display: none}
img {vertical-align: middle;}
/* Slideshow container */
.slideshow-container {
max-width: 1000px;
position: relative;
margin: auto;
}
/* Next & previous buttons */
.prev, .next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
padding: 16px;
margin-top: -22px;
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}
}
/* On smaller screens, decrease text size */
@media only screen and (max-width: 300px) {
.prev, .next,.text {font-size: 11px}
}
</style>
</head>
<body>
<div>
<div>
<div>1 / 3</div>
<img src=”img_nature_wide.jpg” style=”width:100%”>
<div>Caption Text</div>
</div>
<div>
<div>2 / 3</div>
<img src=”img_snow_wide.jpg” style=”width:100%”>
<div>Caption Two</div>
</div>
<div>
<div>3 / 3</div>
<img src=”img_mountains_wide.jpg” style=”width:100%”>
<div>Caption Three</div>
</div>
<a onclick=”plusSlides(-1)”>❮</a>
<a onclick=”plusSlides(1)”>❯</a>
</div>
<br>
<div style=”text-align:center”>
<span onclick=”currentSlide(1)”></span>
<span onclick=”currentSlide(2)”></span>
<span onclick=”currentSlide(3)”></span>
</div>
<script>
let slideIndex = 1;
showSlides(slideIndex);
function plusSlides(n) {
showSlides(slideIndex += n);
}
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”;
}
</script>
</body>
</html>
Automatic Slideshow
To display an automatic slideshow, use the following code:
Example
<!DOCTYPE html>
<html>
<head>
<meta name=”viewport” content=”width=device-width, initial-scale=1″>
<style>
* {box-sizing: border-box;}
body {font-family: Verdana, sans-serif;}
.mySlides {display: none;}
img {vertical-align: middle;}
/* Slideshow container */
.slideshow-container {
max-width: 1000px;
position: relative;
margin: auto;
}
/* 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 {
height: 15px;
width: 15px;
margin: 0 2px;
background-color: #bbb;
border-radius: 50%;
display: inline-block;
transition: background-color 0.6s ease;
}
.active {
background-color: #717171;
}
/* Fading animation */
.fade {
animation-name: fade;
animation-duration: 1.5s;
}
@keyframes fade {
from {opacity: .4}
to {opacity: 1}
}
/* On smaller screens, decrease text size */
@media only screen and (max-width: 300px) {
.text {font-size: 11px}
}
</style>
</head>
<body>
<h2>Automatic Slideshow</h2>
<p>Change image every 2 seconds:</p>
<div>
<div>
<div>1 / 3</div>
<img src=”img_nature_wide.jpg” style=”width:100%”>
<div>Caption Text</div>
</div>
<div>
<div>2 / 3</div>
<img src=”img_snow_wide.jpg” style=”width:100%”>
<div>Caption Two</div>
</div>
<div>
<div>3 / 3</div>
<img src=”img_mountains_wide.jpg” style=”width:100%”>
<div>Caption Three</div>
</div>
</div>
<br>
<div style=”text-align:center”>
<span></span>
<span></span>
<span></span>
</div>
<script>
let slideIndex = 0;
showSlides();
function showSlides() {
let i;
let slides = document.getElementsByClassName(“mySlides”);
let dots = document.getElementsByClassName(“dot”);
for (i = 0; i < slides.length; i++) {
slides[i].style.display = “none”;
}
slideIndex++;
if (slideIndex > slides.length) {slideIndex = 1}
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”;
setTimeout(showSlides, 2000); // Change image every 2 seconds
}
</script>
</body>
</html>
Multiple Slideshows
Example
<!DOCTYPE html>
<html>
<head>
<meta name=”viewport” content=”width=device-width, initial-scale=1″>
<style>
* {box-sizing: border-box}
.mySlides1, .mySlides2 {display: none}
img {vertical-align: middle;}
/* Slideshow container */
.slideshow-container {
max-width: 1000px;
position: relative;
margin: auto;
}
/* Next & previous buttons */
.prev, .next {
cursor: pointer;
position: absolute;
top: 50%;
width: auto;
padding: 16px;
margin-top: -22px;
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 grey background color */
.prev:hover, .next:hover {
background-color: #f1f1f1;
color: black;
}
</style>
</head>
<body>
<h2 style=”text-align:center”>Multiple Slideshows</h2>
<p>Slideshow 1:</p>
<div>
<div>
<img src=”img_nature_wide.jpg” style=”width:100%”>
</div>
<div>
<img src=”img_snow_wide.jpg” style=”width:100%”>
</div>
<div>
<img src=”img_mountains_wide.jpg” style=”width:100%”>
</div>
<a onclick=”plusSlides(-1, 0)”>❮</a>
<a onclick=”plusSlides(1, 0)”>❯</a>
</div>
<p>Slideshow 2:</p>
<div>
<div>
<img src=”img_band_chicago.jpg” style=”width:100%”>
</div>
<div>
<img src=”img_band_la.jpg” style=”width:100%”>
</div>
<div>
<img src=”img_band_ny.jpg” style=”width:100%”>
</div>
<a onclick=”plusSlides(-1, 1)”>❮</a>
<a onclick=”plusSlides(1, 1)”>❯</a>
</div>
<script>
let slideIndex = [1,1];
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”;
}
</script>
</body>
</html>