var slideIndex = 0;
var timer1, timer;
var slides = document.getElementsByClassName("mySlides");
var dots = document.getElementsByClassName("dot");
function showSlides() {//called by automatic slideshow
clearTimeout(timer1);//clear previously set timer
//clear styles
for (var i = 0; i < slides.length; i++)
slides[i].style.display = "none";
for (var i = 0; i < dots.length; i++)
dots[i].className = dots[i].className.replace(" active", "");
//reset slideIndex
if (++slideIndex == slides.length)
slideIndex = 0;
//reset styles
slides[slideIndex].style.display = "block";
dots[slideIndex].className += " active";
//reset timer
timer1 = setTimeout(showSlides, 3000);
}
function showSlide(n) {//called when user manually choose particular slide
//clear previously set timers
clearTimeout(timer1);
clearTimeout(timer);
//clear styles
for (var i = 0; i < slides.length; i++)
slides[i].style.display = "none";
for (var i = 0; i < dots.length; i++)
dots[i].className = dots[i].className.replace(" active", "");
//reset slideIndex
if (n == slides.length)
slideIndex = 0;
if (n < 0)
slideIndex = slides.length;
//reset styles
slides[slideIndex].style.display = "block";
dots[slideIndex].className += " active";
//reset timer for automatic slideshow
timer = setTimeout(showSlides, 10000);
}
/* make width, height, min/max properties includes content, padding and border */
* {box-sizing:border-box}
/* Slideshow container */
.slideshow-container {
width: 50vw;
height: 50vh;
position: relative;
margin: auto;
clear:both;
background-color: black;
}
/* Hide the images by default */
.mySlides {
display: none;
}
/* make images fit to slide width */
.mySlides img {
margin: 0;
position: absolute;
top: 50%;
left: 50%;
-ms-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
text-align: center;
height: 50vh; object-fit: fill;
}
/* Next & previous buttons */
.prev, .next {
cursor: pointer;
position: absolute;
top: 50%;
margin: 0;
width: auto;
padding: 16px;
color: white;
font-weight: bold;
font-size: xx-large;
transition: 0.6s;
user-select: none;
-ms-transform: translateY(-50%);
transform: translateY(-50%);
}
/* Position the "next button" to the right */
.next {
right: 0;
}
/* On hover, add a black background color with a little bit see-through */
.prev:hover, .next:hover {
background-color: black;
opacity: 0.7;
}
/* Caption text */
.text {
color: #f2f2f2;
font-size: 4em;
padding-bottom: : 12px;
position: absolute;
bottom: 8px;
width: 100%;
text-align: center;
}
/* Number text (1/3 etc) */
.numbertext {
color: #f2f2f2;
font-size: 1.5em;
padding: 8px 12px;
position: absolute;
top: 0;
z-index: 1;
}
/* Dots container */
.dots-container {
text-align: center;
}
/* 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 {
-webkit-animation-name: fade;
-webkit-animation-duration: 1.5s;
animation-name: fade;
animation-duration: 1.5s;
}
@-webkit-keyframes fade {
from {opacity: .4}
to {opacity: 1}
}
@keyframes fade {
from {opacity: .4}
to {opacity: 1}
}
/* Small devices specific alterations */
@media only screen and (max-width: 600px) {
/* Slideshow container */
.slideshow-container {
width: 96vw;
}
.text {
font-size: 1.5em;
}
.numbertext {
font-size: 1em;
}
/* Next & previous buttons */
.prev, .next {
padding: 4px;
font-weight: bold;
font-size: large;
}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Apple</title>
</head>
<!-- start slideshow on page load. -->
<body onload="showSlide(1);">
<div class="title">
<h1>Photoreal Scenery</h1>
</div>
<!-- Slideshow container -->
<div class="slideshow-container">
<!-- Full-width images with number and caption text -->
<div class="mySlides fade" >
<div class="numbertext">1 / 4</div>
<img src="red.png">
<div class="text">Caption Text</div>
</div>
<div class="mySlides fade">
<div class="numbertext">2 / 4</div>
<img src="blue.png">
<div class="text">Caption Two</div>
</div>
<div class="mySlides fade">
<div class="numbertext">3 / 4</div>
<img src="green.png">
<div class="text">Caption Three</div>
</div>
<div class="mySlides fade">
<div class="numbertext">4 / 4</div>
<img src="j.jpg">
<div class="text">Caption Three</div>
</div>
<!-- Next and previous buttons -->
<a class="prev" onclick="showSlide(--slideIndex);">❮</a>
<a class="next" onclick="showSlide(++slideIndex);">❯</a>
</div>
<br>
<!-- The dots/circles -->
<div class="dots-container">
<span class="dot" onclick="showSlide(slideIndex = 0)"></span>
<span class="dot" onclick="showSlide(slideIndex = 1)"></span>
<span class="dot" onclick="showSlide(slideIndex = 2)"></span>
<span class="dot" onclick="showSlide(slideIndex = 3)"></span>
</div>
</body>
</html>