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
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;
}
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["demo"];
let 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 »