Develop Reference

Swiper js with thumbs

I have two slider on one page. The first slider works fine, but on the second one the thumbs do not work, they are not active and do not move with the main slider.
<script>
var swiper = new Swiper(".mySwiper", {
spaceBetween: 10,
slidesPerView: 4,
freeMode: true,
watchSlidesProgress: true,
});
var swiper2 = new Swiper(".mySwiper2", {
spaceBetween: 10,
navigation: {
nextEl: ".swiper-button-next",
prevEl: ".swiper-button-prev",
},
thumbs: {
swiper: swiper,
},
});
var swiper3 = new Swiper(".mySwiper3", {
spaceBetween: 10,
slidesPerView: 4,
freeMode: true,
watchSlidesProgress: true,
});
var swiper4 = new Swiper(".mySwiper4", {
spaceBetween: 10,
navigation: {
nextEl: ".swiper-button-next",
prevEl: ".swiper-button-prev",
},
thumbs: {
swiper: swiper,
},
});
</script>

Why doesn't the number of the active slide change in Swiper JS in pagination with a fraction?

I have an .image-slider__fraction block that I tried to set up to display the number of the active slide from the total number of slides, but for some reason in the javascript it gives me the error "Uncaught ReferenceError: myImageSLider is not defined", but I don't understand why
Site http://ilyin1ib.beget.tech/
Code https://jsfiddle.net/qav8z7f3/
let mySliderAllSlides = document.querySelector('.image-slider__total');
let mySliderCurrentSlide = document.querySelector('.image-slider__current');
mySliderAllSlides.innerHTML = myImageSLider.slides.length;
myImageSLider.on('slideChange', function() {
let currentSlide = ++myImageSLider.realIndex;
mySliderCurrentSlide.innerHTML = currentSlide;
});
<div class="image-slider__fraction">
<div class="image-slider__current">1</div>
<div class="image-slider__sepparator">/</div>
<div class="image-slider__total">1</div>
</div>

You can achieve it like this. https://jsfiddle.net/zoymLphf/
Use swiper API methods. Counting the total number of slides is kinda tricky when you use loop mode, maybe there is a more elegant solution for this.
const swiper = new Swiper('.image-slider', {
// Optional parameters
slidesPerView: 3,
on: {
init: function(sw) {
$('.image-slider__total').text($('.swiper-slide:not(.swiper-slide-duplicate)').length)
$('.image-slider__current').text(sw.realIndex + 1)
},
slideChange: function (sw) {
$('.image-slider__current').text(sw.realIndex + 1)
},
},
spaceBetween: 30,
direction: 'horizontal',
centeredSlides: true,
loop: true,
loopedSLides: 3,
simulateTouch: true,
grabCursor: true,
speed: 800,
pagination: {
el: '.swiper-pagination',
type: 'progressbar'
},
navigation: {
nextEl: '.swiper-button-next',
prevEl: '.swiper-button-prev',
},
autoplay: {
delay: 1000,
}
});

How do I get multiple swiper galleries with thumbs to work on same page

var galleryThumbs = new Swiper('.gallery-thumbs', {
spaceBetween: 10,
slidesPerView: 4,
loop: true,
freeMode: true,
loopedSlides: 5, //looped slides should be the same
watchSlidesVisibility: true,
watchSlidesProgress: true,
});
var galleryTop = new Swiper('.gallery-top', {
spaceBetween: 10,
loop: true,
loopedSlides: 5, //looped slides should be the same
navigation: {
nextEl: '.swiper-button-next',
prevEl: '.swiper-button-prev',
},
thumbs: {
swiper: galleryThumbs,
},
});
the problem is when i want to use more than two Swiper thumb in one page they will not link properly (galleryThumbs ,galleryTop)
and i think i know the problem is in this part:
thumbs: {
swiper: galleryThumbs,
},

how to include smooth transition to the sliding image carousel using the java-script?

I have made an automatic sliding image carousel in my website with the the HTML, CSS & Java-Script but the transition from one image to another is not good. Please guide me what to add in the Java-Script area to make the transition smooth?
I have tried the below java-script but I also want to add the smooth transition between the images.
<script>
var swiper = new Swiper('.swiper-container', {
slidesPerView: 3,
spaceBetween: 30,
autoplay: {
delay: 3000,
disableOnInteraction: false,
},
pagination: {
el: '.swiper-pagination',
clickable: true,
},
navigation: {
nextEl: '.swiper-button-next',
prevEl: '.swiper-button-prev',
},
});
</script>

Add a by default fade effect:
var swiper = new Swiper('.swiper-container', {
slidesPerView: 3,
spaceBetween: 30,
autoplay: {
delay: 3000,
disableOnInteraction: false,
},
pagination: {
el: '.swiper-pagination',
clickable: true,
},
navigation: {
nextEl: '.swiper-button-next',
prevEl: '.swiper-button-prev',
},
effect: fade,
fadeEffect: {
crossFade: true }
});
More effects and animations for your carousel are provided here.

How to make autoplay of the Swiper slider start only after the slider enters viewport?

I'm using this code to initialize swiper slider.
var mySwiper = new Swiper ('.swiper-container', {
// Optional parameters
pagination: '.swiper-pagination',
paginationClickable: true,
nextButton: '.swiper-button-next',
prevButton: '.swiper-button-prev',
spaceBetween: 0,
parallax: true,
autoplay: 5000,
speed: 800,
autoplayDisableOnInteraction: false
})
Since the slider is positioned inside the fourth section of the page and is visible only after the page is scrolled down, I would like to make the autoplay start only after the slider enters the viewport.
Is there a way to do this?

var mySwiper = new Swiper('.swiper-container', {
autoplay: {
delay: 5000,
},
});

Assuming you're trying play on 4th slides:
var mySwiper = new Swiper ('.swiper-container', {
// Optional parameters
pagination: '.swiper-pagination',
paginationClickable: true,
nextButton: '.swiper-button-next',
prevButton: '.swiper-button-prev',
spaceBetween: 0,
parallax: true,
autoplay: 5000,
speed: 800,
autoplayDisableOnInteraction: false,
onSlideChangeStart: function(s){
if (s.activeIndex === 3) {
// do something here, 4th slide is active now and so on
console.log('hi! Try to reach 4th slides');
s.startAutoplay(); // calling autoplay on 4th slides.
}
}
})

You could potentially use something like jquery appear - https://github.com/morr/jquery.appear
$('mySwiperContainer').on('appear', function(event, $all_appeared_elements) {
// this element is now inside browser viewport
var mySwiper = new Swiper ('.swiper-container', {
// Optional parameters
pagination: '.swiper-pagination',
paginationClickable: true,
nextButton: '.swiper-button-next',
prevButton: '.swiper-button-prev',
spaceBetween: 0,
parallax: true,
autoplay: 5000,
speed: 800,
autoplayDisableOnInteraction: false
})
});

Object with autoplay parameters needs to be used, or just boolean true to enable with default settings to enable autoplay. Here is an example with delay (between transitions in ms) parameter:
const swiper = new Swiper('.swiper', {
autoplay: {
delay: 5000,
},
});
Documentation reference here