javascript - How to slide a banner using jquery?
Get the solution ↓↓↓code:
<script>
var slideIndex = 1;
showSlides(slideIndex);
function plusSlides(n) {
showSlides(slideIndex += n);
}
function currentSlide(n) {
showSlides(slideIndex = n);
}
function showSlides(n) {
var i;
var slides = document.getElementsByClassName("mySlides");
var dots = document.getElementsByClassName("dot");
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";
}
</script>
<div class="slideshow-container">
<?php
if(empty($banner))
{
echo $this->session->flashdata('error');
}
else
{
foreach($banner as $ban)
{
?>
<a href="<?php echo base_url(); ?>product/<?php echo $ban['category']; ?>">
<div class="mySlides fade">
<img src="<?php echo base_url(); ?>asset/banner/<?php echo $ban['banner']; ?>" style="width:100%">
</div>
</a>
<?php
}
}
?>
<a class="prev" onclick="plusSlides(-1)">❮</a>
<a class="next" onclick="plusSlides(1)">❯</a>
</div>
In this code I am creating banner slider section where images are showing dynamically perfect but images are not sliding automatically one by one. So, How can I slide images one by one? Please help me.
Thank You
Answer
Solution:
I don't see any element with class dot. Removing references to those you can simply add a setInterval() callback.
var slideIndex = 1;
function plusSlides(n) {
showSlides(slideIndex += n);
}
function currentSlide(n) {
showSlides(slideIndex = n);
}
function showSlides(n) {
var i;
var slides = document.getElementsByClassName("mySlides");
var dots = document.getElementsByClassName("dot");
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";
}
showSlides(slideIndex);
setInterval(function() {
plusSlides(1);
}, 300);
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="slideshow-container">
<a href="">
<div class="mySlides fade">
<img src="https://dummyimage.com/100x100/000/fff&text=1">
</div>
</a>
<a href="">
<div class="mySlides fade">
<img src="https://dummyimage.com/100x100/000/fff&text=2">
</div>
</a>
<a href="">
<div class="mySlides fade">
<img src="https://dummyimage.com/100x100/000/fff&text=3">
</div>
</a>
<br/>
<a class="prev" onclick="plusSlides(-1)">❮</a>
<a class="next" onclick="plusSlides(1)">❯</a>
</div>
Answer
Solution:
- Use
itv = setInterval(callback, timing)
to autoplay the slideshow - Use
clearInterval(itv)
on'mouseenter'
Event. - Don't use inline STYLE and JS like
onclick=""
- Don't limit yourself on the number of slideshows per-page
Here's a slightly modified example:
!(function() {
const slideshow = EL => {
const ELS_prevNext = EL.querySelectorAll('.prev, .next');
const ELS_slide = EL.querySelectorAll('.slide');
const t = ELS_slide.length;
let c = 0;
let itv = null;
const slide = () => {
c = c<0 ? t-1 : c%t;
ELS_slide.forEach(EL => EL.classList.remove('is-active'));
ELS_slide[c].classList.add('is-active');
};
const play = () => itv = setInterval(() => {++c, slide()}, 3000);
const stop = () => clearInterval(itv);
ELS_prevNext.forEach(EL => EL.addEventListener('click', ev => {
ev.preventDefault();
c = (ev.currentTarget.classList.contains('next') ? ++c : --c);
slide();
}));
EL.addEventListener('mouseenter', stop);
EL.addEventListener('mouseleave', play);
play(); // Start slideshow!!!
};
document.querySelectorAll('.slideshow').forEach(slideshow);
}());
* {
margin: 0;
box-sizing: border-box;
}
.slideshow {
position: relative;
width: 100%;
height: 250px;
}
.slideshow .slide {
position: absolute;
width: 100%;
height: 100%;
transition: opacity 0.4s, visibility 0.4s;
visibility: hidden;
opacity: 0;
}
.slideshow .slide.is-active {
visibility: visible;
opacity: 1;
}
.slideshow .slide img {
display: block;
width: 100%;
height: 100%;
object-fit: cover;
}
.slideshow .prev,
.slideshow .next {
cursor: pointer;
user-select: none;
position: absolute;
font-size: 5em;
color: #fff;
right: 10px;
top: 50%;
transform: translateY(-50%);
}
.slideshow .prev {
right: auto;
}
<h2>SLIDESHOW AUTOPLAY AND PAUSE ON HOVER</h2>
<div class="slideshow">
<a href="#!">
<div class="slide is-active">
<img src="//placehold.it/800x600/0bf?text=1">
</div>
</a>
<a href="#!">
<div class="slide">
<img src="//placehold.it/800x600/f0b?text=2">
</div>
</a>
<a href="#!">
<div class="slide">
<img src="//placehold.it/800x600/bf0?text=3">
</div>
</a>
<a class="prev">❮</a>
<a class="next">❯</a>
</div>
<h2>AS MANY SLIDESHOWS AS YOU WANT</h2>
<div class="slideshow">
<a href="#!">
<div class="slide is-active">
<img src="//placehold.it/800x600/fb0?text=A">
</div>
</a>
<a href="#!">
<div class="slide">
<img src="//placehold.it/800x600/0fb?text=B">
</div>
</a>
<a href="#!">
<div class="slide">
<img src="//placehold.it/800x600/b0f?text=C">
</div>
</a>
<a class="prev">❮</a>
<a class="next">❯</a>
</div>
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