Today I learnt how to build a carousel using HTML, Javascript and CSS. A carousel is a container (slideshow) of images or info that users can select by clicking a button that directs them forward or backward in the slideshow.
HTML
<html>
<head><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.1/normalize.css">
<link rel="stylesheet" href="styles.css">
</head>
<body class="container">
<div class="carousel">
<div class="carousel-item carousel-item-visible">
<img src="images/1.jpg" />
</div>
<div class="carousel-item">
<img src="images/2.jpg" />
</div>
<div class="carousel-item">
<img src="images/3.jpg" />
</div>
<div class="carousel-actions">
<button id="carousel-button-prev" aria-label="Previous Slidex"><</button>
<button id="carousel-button-next" aria-label="Next Slide">></button>
</div>
</div>
<script src="index.js"></script>
</body>
</html>
CSS
body{
margin:0;
background-color: rgba(77, 66, 71, 0.21);
}
.container{
display:flex;
align-items:center;
justify-content: center;
}
.carousel {
max-width: 600px;
position: relative;
}
.carousel .carousel-item,
.carousel .carousel-item-hidden {
display: none;
}
.carousel .carousel-item-visible {
display: block;
animation: fadeVisibility 0.5s;
}
.carousel .carousel-item img {
width: 100%;
max-width: 600px;
height: auto;
}
.carousel .carousel-actions {
display: flex;
width: 100%;
justify-content: space-between;
position: absolute;
top: 50%;
transform: translateY(-50%);
}
.carousel .carousel-actions button {
border-radius: 50px;
background-color: white;
border: 0;
font-size: 16px;
font-weight: bold;
cursor: pointer;
width: 40px;
height: 40px;
}
.carousel .carousel-actions button#carousel-button-prev {
margin-left: 20px;
}
.carousel .carousel-actions button#carousel-button-next {
margin-right: 20px;
}
@keyframes fadeVisibility {
0% {
opacity: 0;
}
100% {
opacity: 1;
}
}
Javascript
const slides = document.getElementsByClassName('carousel-item');
let slidePosition = 0;
const totalSlides = slides.length;
document.getElementById('carousel-button-next').addEventListener('click', moveToNextSlide);
document.getElementById('carousel-button-prev').addEventListener('click', moveToPrevSlide);
function hideAllSlides() {
for (let slide of slides) {
slide.classList.remove('carousel-item-visible');
slide.classList.add('carousel-item-hidden');
}
}
function moveToNextSlide() {
hideAllSlides();
if (slidePosition === totalSlides - 1) {
slidePosition = 0;
} else {
slidePosition++;
}
slides[slidePosition].classList.add("carousel-item-visible");
}
function moveToPrevSlide() {
hideAllSlides();
if (slidePosition === 0) {
slidePosition = totalSlides - 1;
} else {
slidePosition--;
}
slides[slidePosition].classList.add("carousel-item-visible");
}
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