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I am using w3school's slideshow code. In the tryit editor they provide, it works fine. When I put it in Visual Studio Code, the arrows don't change the image like the tryit editor did. Why is this? How can I fix it? The link to the w3schools page is here: https://www.w3docs.com/tools/code-editor/3720
Code:
<!DOCTYPE html>
<html>
<head>
<title>Slideshow Images</title>
<style>
* {
box-sizing: border-box
}
body {
font-family: Verdana, sans-serif;
margin: 0
}
.mySlides {
display: none
}
img {
vertical-align: middle;
}
.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: #ffffff;
font-size: 15px;
padding: 8px 12px;
position: absolute;
bottom: 8px;
width: 100%;
text-align: center;
}
/* Number text (1/3 etc) */
.numbertext {
color: #ffffff;
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: #999999;
border-radius: 50%;
display: inline-block;
transition: background-color 0.6s ease;
}
.active,
.dot:hover {
background-color: #111111;
}
/* 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
}
}
/* On smaller screens, decrease text size */
@media only screen and (max-width: 300px) {
.prev,
.next,
.text {
font-size: 11px
}
}
</style>
</head>
<body>
<div class="slideshow-container">
<div class="mySlides fade">
<div class="numbertext">1 / 3</div>
<img src="https://www.w3docs.com/uploads/media/default/0001/03/66cf5094908491e69d8187bcf934050a4800b37f.jpeg" style="width:100%">
<div class="text">London, Ebgland</div>
</div>
<div class="mySlides fade">
<div class="numbertext">2 / 3</div>
<img src="https://www.w3docs.com/uploads/media/default/0001/03/b7d624354d5fa22e38b0ab1f9b905fb08ccc6a05.jpeg" style="width:100%">
<div class="text">Sunset in Romania</div>
</div>
<div class="mySlides fade">
<div class="numbertext">3 / 3</div>
<img src="https://www.w3docs.com/uploads/media/default/0001/03/5bfad15a7fd24d448a48605baf52655a5bbe5a71.jpeg" style="width:100%">
<div class="text">New York, USA</div>
</div>
<a class="prev" onclick="plusSlides(-1)">❮</a>
<a class="next" onclick="plusSlides(1)">❯</a>
</div>
<br>
<div style="text-align:center">
<span class="dot" onclick="currentSlide(0)"></span>
<span class="dot" onclick="currentSlide(1)"></span>
<span class="dot" onclick="currentSlide(2)"></span>
</div>
<script>
let slideIndex = 0;
let timeoutId = null;
const slides = document.getElementsByClassName("mySlides");
const dots = document.getElementsByClassName("dot");
showSlides();
function currentSlide(index) {
slideIndex = index;
showSlides();
}
function plusSlides(step) {
if(step < 0) {
slideIndex -= 2;
if(slideIndex < 0) {
slideIndex = slides.length - 1;
}
}
showSlides();
}
function showSlides() {
for(let i = 0; i < slides.length; i++) {
slides[i].style.display = "none";
dots[i].classList.remove('active');
}
slideIndex++;
if(slideIndex > slides.length) {
slideIndex = 1
}
slides[slideIndex - 1].style.display = "block";
dots[slideIndex - 1].classList.add('active');
if(timeoutId) {
clearTimeout(timeoutId);
}
timeoutId = setTimeout(showSlides, 5000); // Change image every 5 seconds
}
</script>
</body>
</html>