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:
Create A Slideshow Gallery
Step 1) Add HTML:
Example
<!-- 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>
<div class="mySlides">
<div class="numbertext">2 / 6</div>
<img src="img_5terre_wide.jpg"
style="width:100%">
</div>
<div class="mySlides">
<div class="numbertext">3 / 6</div>
<img src="img_mountains_wide.jpg"
style="width:100%">
</div>
<div class="mySlides">
<div class="numbertext">4 / 6</div>
<img src="img_lights_wide.jpg"
style="width:100%">
</div>
<div class="mySlides">
<div class="numbertext">5 / 6</div>
<img src="img_nature_wide.jpg"
style="width:100%">
</div>
<div class="mySlides">
<div class="numbertext">6 / 6</div>
<img src="img_snow_wide.jpg"
style="width:100%">
</div>
<!--
Next and previous buttons -->
<a class="prev" onclick="plusSlides(-1)">❮</a>
<a class="next" onclick="plusSlides(1)">❯</a>
<!-- Image text -->
<div
class="caption-container">
<p id="caption"></p>
</div>
<!-- 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>
<div class="column">
<img class="demo cursor" src="img_5terre.jpg" style="width:100%" onclick="currentSlide(2)"
alt="Cinque Terre">
</div>
<div class="column">
<img class="demo
cursor" src="img_mountains.jpg" style="width:100%" onclick="currentSlide(3)"
alt="Mountains and fjords">
</div>
<div class="column">
<img class="demo
cursor" src="img_lights.jpg" style="width:100%" onclick="currentSlide(4)"
alt="Northern Lights">
</div>
<div
class="column">
<img class="demo cursor" src="img_nature.jpg"
style="width:100%" onclick="currentSlide(5)" alt="Nature and sunrise">
</div>
<div class="column">
<img class="demo cursor" src="img_snow.jpg" style="width:100%" onclick="currentSlide(6)"
alt="Snowy Mountains">
</div>
</div>
</div>
Step 2) Add CSS:
Style the image gallery, next and previous buttons, the caption text and the dots:
Example
* {
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 */
.prev,
.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 */
.prev:hover,
.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;
}
/* 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;
}
.active,
.demo:hover {
opacity: 1;
}
Step 3) Add JavaScript:
Example
var 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) {
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 »
