Iterate matching elements to control custom slick carousels - javascript

I am using slick carousel with some custom code to provide pagination. It's working great but now I want to have multiple carousels per page and although I've found solutions, I'm having trouble getting them to work with the customisations in my code.
There is an example [here] (Multiple Slick Sliders Issue) that iterates over all elements with a particular class and assigns an ID, but I just can't get it working with the custom pagination code I have.
$('.carousel').on('init afterChange', function(event, slick, currentSlide){
let total = $('.carousel .item').length;
var first = $('.slick-active:first > div:first').get(0);
var last = $('.slick-active:last > div:last').get(0);
if($(last).html() == '')
last = $('.slick-active:last > div:not(:empty)').get(0);
let start,end;
$('.slick-slide > div').each(function(i,v){
if(first === $(v).get(0)) {
start = i+1;
}
if(last === $(v).get(0)) {
end = i+1;
}
});
$('.results').html(`Showing ${start} to ${end} of ${total} results`)
})
$('.carousel').slick({
rows: 2,
slidesToShow: 3,
slidesToScroll: 3,
autoplay: false,
arrows: true,
infinite: false,
draggable: false,
prevArrow: $('.prev'),
nextArrow: $('.next')
})
.item {
background: silver;
color: black;
text-align: center;
font-size: 30px;
display: inline;
border: 5px solid white;
}
.nav {
width: 100%;
}
.nav p{
width: 50%;
float: left;
display: block;
text-align: center;
}
.results {
text-align: center;
width: 100%;
padding-top: 10px
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.9.0/slick-theme.min.css" rel="stylesheet"/>
<link href="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.9.0/slick.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.9.0/slick.js"></script>
<div class="carousel">
<div class="item">1</div>
<div class="item">2</div>
<div class="item">3</div>
<div class="item">4</div>
<div class="item">5</div>
<div class="item">6</div>
<div class="item">7</div>
<div class="item">8</div>
<div class="item">9</div>
<div class="item">10</div>
<div class="item">11</div>
<div class="item">12</div>
<div class="item">13</div>
<div class="item">14</div>
<div class="item">15</div>
<div class="item">16</div>
<div class="item">17</div>
<div class="item">18</div>
</div>
<div class="nav">
<p class="prev">prev</p>
<p class="next">next</p>
</div>
<div class="results">
Showing 1 to 9 of [total] results
</div>


You could create a wrapper container to isolate instances
<div class="slider">
<div class="carousel">
<div class="item">1</div>
<div class="item">2</div>
</div>
<div class="nav">
<p class="prev">prev</p>
<p class="next">next</p>
</div>
<div class="results">
Showing 1 to 9 of [total] results
</div>
</div>
Then to initialize use an each loop for isolation
$('.slider').each(function() {
var $slider = $(this),
// arrows within this instance
$nArrow = $slider.find('.next'),
$pArrow = $slider.find('.prev');
// initialize this carousel instance with appropriate arrows
$slider.find('.carousel').slick({
rows: 2,
slidesToShow: 3,
slidesToScroll: 3,
autoplay: false,
arrows: true,
infinite: false,
draggable: false,
prevArrow: $pArrow,
nextArrow: $nArrow
});
})
For the events , look up to the container class and use find() for the elements within that instance
$('.carousel').on('init afterChange', function(event, slick, currentSlide){
var $slider = $(this).parent();
// examples finding elements within this instance
let total = $slider.find('.carousel .item').length;
var first = $slider.find('.slick-active:first > div:first').get(0);
var last = $slider.find('.slick-active:last > div:last').get(0);
// use find for other elements also
......
})

Related

Go back to the prevoius slide using slick and jquery

I have slides that contain multiple calls to actions which open different slide on click
eg if a user is in slide number 1 and clicks a button which opens slide number 5, on clicking button go back it should go back to slide number 1
Here is : LIVE DEMO
HTML
<div class="main">
<div class="slider carousel">
<div><h3>1</h3></div>
<div><h3>2</h3></div>
<div><h3>3</h3></div>
<div><h3>4</h3></div>
<div><h3>5</h3></div>
</div>
<div class="action">
<a id="slide_3" href="#" data-slide="3">go to slide 3</a>
<a id="slide_4" href="#" data-slide="4">go to slide 4</a>
<a id="slide_5" href="#" data-slide="5">go to slide 5</a>
<a id="go-back" href="#" data-slide="5">GO BACK</a>
</div>
</div>
Js
var sliderIndex = 0;
$('.carousel').slick({
slidesToShow: 1,
slidesToScroll: 1,
arrows: false,
fade: true,
});
$("#slide_3").click(function() {
$(".carousel").slick('slickGoTo', parseInt(2));
})
$("#slide_4").click(function() {
$(".carousel").slick('slickGoTo', parseInt(3));
})
$("#slide_5").click(function() {
$(".carousel").slick('slickGoTo', parseInt(4));
})
$('.carousel').on('afterChange', function(e, s, currentSlideIndex) {
sliderIndex = currentSlideIndex-1;
});
$("#go-back").click(function() {
$(".carousel").slick('slickGoTo', parseInt(sliderIndex));
})
Problem: assume I am in slide number 5 Now when I click go to slide 3
and click go back instead of going back to slide number 5 it will go
to slide number 2

The button Go Back in your code just goes back to previous index of current slide. e.g. if current slide is n, it will just go back to n - 1.
If you want Go Back to go back to previous slide that you clicked, you should keep track of current as well as previous index.
Please refer below code -
var currentSliderIndex = 0;
var previousSliderIndex = 0;
$('.carousel').slick({
slidesToShow: 1,
slidesToScroll: 1,
arrows: false,
fade: true,
});
$("#slide_3").click(function(){
$(".carousel").slick('slickGoTo', parseInt(2));
})
$("#slide_4").click(function(){
$(".carousel").slick('slickGoTo', parseInt(3));
})
$("#slide_5").click(function(){
$(".carousel").slick('slickGoTo', parseInt(4));
})
$('.carousel').on('afterChange', function (e, s, currentSlideIndex) {
previousSliderIndex = currentSliderIndex
currentSliderIndex = currentSlideIndex;
});
$("#go-back").click(function () {
$(".carousel").slick('slickGoTo', parseInt(previousSliderIndex));
})
body{
background:#ccc;
}
.main {
font-family:Arial;
width:500px;
display:block;
margin:0 auto;
}
h3 {
background: #fff;
color: #3498db;
font-size: 36px;
line-height: 100px;
margin: 10px;
padding: 2%;
position: relative;
text-align: center;
}
.action{
display:block;
margin:100px auto;
width:100%;
text-align:center;
}
.action a {
display:inline-block;
padding:5px 10px;
background:#f30;
color:#fff;
text-decoration:none;
}
.action a:hover{
background:#000;
}
#go-back{
background-color: green;
}
<link href="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.5.9/slick-theme.min.css" rel="stylesheet"/>
<link href="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.5.9/slick.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.9.0/slick.min.js"></script>
<div class="main">
<div class="slider carousel">
<div><h3>1</h3></div>
<div><h3>2</h3></div>
<div><h3>3</h3></div>
<div><h3>4</h3></div>
<div><h3>5</h3></div>
</div>
<div class="action">
<a id="slide_3" href="#" data-slide="3">go to slide 3</a>
<a id="slide_4" href="#" data-slide="4">go to slide 4</a>
<a id="slide_5" href="#" data-slide="5">go to slide 5</a>
<a id="go-back" href="#" data-slide="5">GO BACK</a>
</div>
</div>
Note - This will only keep track of a single previous slide, if you click back multiple times, it will just keep shuffling between 2 slides.

Slick slider not working when initialSlide is set

I can't figure out why the slides do not slide when I have an initialSlide set. I'm referring to the docs at https://kenwheeler.github.io/slick/, but couldn't figure out what the problem is.
$('.container').slick({
initialSlide: 4,
infinite: false,
slidesToShow: 3,
slidesToScroll: 1
})
* {
box-sizing: border-box;
}
.container {
width: 120px;
}
.slide {
border: 1px solid red;
width: 40px;
}
<link href="https://cdn.jsdelivr.net/npm/slick-carousel#1.8.1/slick/slick.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/slick-carousel#1.8.1/slick/slick.min.js"></script>
<div class="container">
<div class="slide">1</div>
<div class="slide">2</div>
<div class="slide">3</div>
<div class="slide">4</div>
<div class="slide">5</div>
</div>

You have set the initial slide to 4 (i.e. index 4 is slide #5) - this is the last slide in your carousel. The problem is that your carousel is showing 3 slides, so you want the initial slide to be #3 which has index: 2:
(total slides - slidesToShow) = 5-3 = 2
If you set initialSlide: 2 this will still show the last 3 slides but it also sets up the "previous" button to go to slide #2 which will trigger a scroll. (The Next button won't have any effect of course, because you are showing the last slide and have infinite:false)
Working Example:
$('.container').slick({
initialSlide: 2,
infinite: false,
slidesToShow: 3,
slidesToScroll: 1
})
* {
box-sizing: border-box;
}
.container {
width: 120px;
}
.slide {
border: 1px solid red;
width: 40px;
}
<link href="https://cdn.jsdelivr.net/npm/slick-carousel#1.8.1/slick/slick.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/slick-carousel#1.8.1/slick/slick.min.js"></script>
<div class="container">
<div class="slide">1</div>
<div class="slide">2</div>
<div class="slide">3</div>
<div class="slide">4</div>
<div class="slide">5</div>
</div>

it is to work
$('.container').slick({
infinite: false,
slidesToShow: 2,
slidesToScroll: 1,
initialSlide: 3
})
you have 5 slides, but the initial one you specified is 4, and at the same time show 3. but the initial 1 is slide 2, the Initial 4 is slide 5, but slidesToShow: 3. the slider doesn't have any spare slides to show
while I was writing the answer it is already given in the comments

Since 2014 initialSlide not working in responsive config, so can use
$('.selector').slick('slickGoTo', 5);

Owl Carousel with conditionals on its options

I've got a dozen galleries and some of them only has one image. This is causing the carousel and page to break because the carousel has loop = true set on it. I'm trying to write a condition to say if there's more than one item in the carousel, to make loop = true else make loop = false. However, I took a shot at it but it doesn't seem to be working.
$(".mbgc-gallery").owlCarousel({
margin: 0,
dots: false,
nav:($(".mbgc-gallery .owl-item").length > 1) ? true: false,
navText: [],
loop:($(".mbgc-gallery .owl-item").length > 1) ? true: false,
autoplay: false,
autoplayHoverPause: true,
responsive: {
0: {
items: 1
},
600: {
items: 1
},
1000: {
items: 1
}
}
});
Can it work like this or do I need to do something after it initializes?
EDIT
I forgot to mention that a page could have more than one gallery on it, so I am not sure if this needs to be wrapped in a .each function or maybe a unique selector? I have data attributes set up on each gallery so it has an unique ID.

Your query in the owlCarousel configuration scans the whole document again. You select all .mbgc-gallerys and then you select all .owl-items of all .mbgc-gallerys.
But you only want to test "this" carousel. Something like this should work:
$(".mbgc-gallery").each(function(index) {
var $gallery = $(this);
var onMultiple = $gallery.children(".owl-item").length > 1 ? true : false;
$gallery.owlCarousel({
loop: onMultiple,
[...]
});
};
edit:
Made a snippet.
Like this?
$('.owl-carousel').each(function(i) {
var ifMultiple = false;
$thisGallery = $(this);
if($thisGallery.children('.item').length > 1) {
ifMultiple = true;
}
$thisGallery.owlCarousel({
loop: ifMultiple,
autoplay: true,
dots: true,
nav: true,
items: 1,
autowidth: true,
nav: false,
dots: false,
responsive:false
})
})
.item {
box-sizing: border-box;
padding: 2rem;
width: 200px;
height: 150px;
background: yellow;
}
.owl-carousel {
border: 1px solid black;
width: 200px !important;
}
<link href="https://owlcarousel2.github.io/OwlCarousel2/assets/owlcarousel/assets/owl.carousel.min.css" rel="stylesheet"/>
<link href="https://owlcarousel2.github.io/OwlCarousel2/assets/owlcarousel/assets/owl.theme.default.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://github.com/OwlCarousel2/OwlCarousel2/raw/develop/dist/owl.carousel.min.js"></script>
<h2>multiple</h2>
<div class="owl-carousel">
<div class="item">1</div>
<div class="item">2</div>
<div class="item">3</div>
<div class="item">4</div>
<div class="item">5</div>
</div>
<h2>single</h2>
<div class="owl-carousel">
<div class="item">1</div>
</div>
<h2>multiple</h2>
<div class="owl-carousel">
<div class="item">1</div>
<div class="item">2</div>
<div class="item">3</div>
</div>
<h2>single</h2>
<div class="owl-carousel">
<div class="item">1</div>
</div>

How can we make different padding top and bottom values for diff sections in fullPage.js?

Normally in fullpage.js we can set single global
paddingTop, paddingBottom value via below code:
$('#fullpage').fullpage({
paddingTop: '130px',
paddingBottom: '50px',
});
My question is can we assign multiple paddingTop,paddingBottom values to individual scroll sections TO achieve more flexible layout display?
$(document).ready(function() {
$('#fullpage').fullpage({
anchors: ['firstPage', 'secondPage'],
sectionsColor: ['#4A6FB1', '#939FAA'],
scrollOverflow: true,
sectionSelector: '.section',
slideSelector: '.slide',
slidesNavigation: true,
slidesNavPosition: 'bottom',
verticalCentered: false,
resize: false,
autoScrolling: true,
paddingTop: '130px',
paddingBottom: '50px'
});
});
.slider-container {
width: 50%;
}
.title-text {
font-size: 30px;
font-weight: bold;
}
p {
line-height: 3em;
}
.contentline { border:1px solid white; }
#demo {
position: absolute;
top: 50px;
margin: 0;
left: 0;
right: 0;
text-align: center;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="http://alvarotrigo.com/fullPage/vendors/jquery.slimscroll.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js"></script>
<link href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css" rel="stylesheet"/>
<link href="http://alvarotrigo.com/fullPage/jquery.fullPage.css" rel="stylesheet"/>
<script src="http://alvarotrigo.com/fullPage/jquery.fullPage.min.js"></script>
<div id="fullpage">
<div class="section">
<div class="container slider-container">
<div class="row margin-0" id="demo">
<div class="col-lg-12 col-md-12 col-sm-12 col-xs-12 padding-0">
<div class="title-text">padding:130px,bottom:80px layout</div>
</div>
</div>
<div class="slide contentline" id="slide1" data-anchor="s1">
<div class="row margin-0">
<div class="col-lg-12 col-md-12 col-sm-12 col-xs-12 padding-0">
<p class="title-text">you may press Arrow Down Key to scroll to the next section </p>
<p>line1</p>
<p>line2</p>
<p>line3</p>
<p>line4</p>
<p>line5</p>
<p>line6</p>
<p>line7</p>
<p>line8</p>
<p>line9</p>
<p>line10</p>
<p>line11</p>
<p>line13</p>
<p>line14</p>
<p>line15</p>
<p>line16</p>
<p>line17</p>
<p>line18</p>
<p>line19</p>
<p>line20</p>
<p>line21</p>
<p>line22</p>
<p>line23</p>
<p>line24</p>
<p>line25</p>
<p>line26</p>
<p>line27</p>
<p>line28</p>
<p>line29</p>
<p>line30</p>
</div>
</div>
</div>
<div class="slide" id="slide2" data-anchor="s2">
slide2
</div>
<div class="slide" id="slide3" data-anchor="s3">
<p>slide3</p>
</div>
<div class="slide" id="slide4" data-anchor="s4">
<p>slide4</p>
</div>
</div>
<!--end of container-->
</div>
<div class="section title-text">
<div class="contentline">
Some sections<br> which require different<br> paddingTop and padding bottom values<br>
For example this page, if i need paddingTop: 20px; paddingBottom:20px;<br> instead of running global value of 130px 50px;<br>
if using css to override padding,<br>
the calculated slider height is still wrong.
</div>
</div>
</div>

You can override it as suggested by #CraigduToit.
Fullpage.js will read your value as you can see here.
Here's an example of overriding the paddingTop value. I've colored in grey the real content area without the paddings.
I just used:
#section2 {
padding-top: 10px !important;
}
With this initialization:
$('#fullpage').fullpage({
sectionsColor: ['yellow', 'orange', 'purple', '#ADD8E6'],
paddingTop: '100px',
paddingBottom: '100px',
scrollOverflow: true,
});

I believe this can be achieved with css, however it requires you to add (or build upon) a uniuque class for each sections content.
I added a class "testingstuff" to your child div on the second section, so the HTML will be:
<div class="section title-text fp-section active testingstuff">....</div>
And then went on to simply create the class in the .css with the following properties:
.testingstuff{
padding:30px 0px 30px 0px !important;
}
So going forward, all you would need to do is create a class for each section, not the most elegant way to do it, but it is rather quick and easy.
Hope this helps.

Synced Carousels

I'm currently working with the Owl Carousel plugin to create multiple synced carousels as per their demo shown on the address below, though with multiple carousels on one page.
http://owlgraphic.com/owlcarousel/demos/sync.html
I've managed to duplicate the carousels successfully and got them to work independently apart from one specific problem when working with different numbers of small items. When I create more items in the top carousel than the bottom and select a small item outside of the bottom carousel's displayed items both small item carousels will shift to show that item (unselected on the top one)
In other words, with the following code, select "20" from the top carousel and watch the bottom carousel's small items carousel shift to the right to display item 20. Then select item 3 on the top small items carousel to watch the bottom small items carousel shift back again. Oddly, when the items number is increased within the bottom carousel's jQuery parameters it doesn't affect the top one at all.
<script type="text/javascript" src="http://code.jquery.com/jquery-1.7.min.js"></script>
<script type="text/javascript" src="http://owlgraphic.com/owlcarousel/owl-carousel/owl.carousel.js"></script>
<script>
$(document).ready(function() {
var sync1 = $("#sync1");
var sync2 = $("#sync2");
sync1.owlCarousel({
singleItem : true,
slideSpeed : 1000,
navigation: true,
pagination:false,
afterAction : syncPosition,
responsiveRefreshRate : 200,
});
sync2.owlCarousel({
items : 20,
itemsDesktop : [1199,10],
itemsDesktopSmall : [979,10],
itemsTablet : [768,8],
itemsMobile : [479,4],
pagination:false,
responsiveRefreshRate : 100,
afterInit : function(el){
el.find(".owl-item").eq(0).addClass("synced");
}
});
function syncPosition(el){
var current = this.currentItem;
$("#sync2")
.find(".owl-item")
.removeClass("synced")
.eq(current)
.addClass("synced")
if($("#sync2").data("owlCarousel") !== undefined){
center(current)
}
}
$("#sync2").on("click", ".owl-item", function(e){
e.preventDefault();
var number = $(this).data("owlItem");
sync1.trigger("owl.goTo",number);
});
function center(number){
var sync2visible = sync2.data("owlCarousel").owl.visibleItems;
var num = number;
var found = false;
for(var i in sync2visible){
if(num === sync2visible[i]){
var found = true;
}
}
if(found===false){
if(num>sync2visible[sync2visible.length-1]){
sync2.trigger("owl.goTo", num - sync2visible.length+2)
}else{
if(num - 1 === -1){
num = 0;
}
sync2.trigger("owl.goTo", num);
}
} else if(num === sync2visible[sync2visible.length-1]){
sync2.trigger("owl.goTo", sync2visible[1])
} else if(num === sync2visible[0]){
sync2.trigger("owl.goTo", num-1)
}
}
/* carousel two */
var sync3 = $("#sync3");
var sync4 = $("#sync4");
sync3.owlCarousel({
singleItem : true,
slideSpeed : 1000,
navigation: true,
pagination:false,
afterAction : syncPosition2,
responsiveRefreshRate : 200,
});
sync4.owlCarousel({
items : 15,
itemsDesktop : [1199,10],
itemsDesktopSmall : [979,10],
itemsTablet : [768,8],
itemsMobile : [479,4],
pagination:false,
responsiveRefreshRate : 100,
afterInit : function(el){
el.find(".owl-item").eq(0).addClass("synced");
}
});
function syncPosition2(el){
var current = this.currentItem;
$("#sync4")
.find(".owl-item")
.removeClass("synced")
.eq(current)
.addClass("synced")
if($("#sync4").data("owlCarousel") !== undefined){
center(current)
}
}
$("#sync4").on("click", ".owl-item", function(e){
e.preventDefault();
var number = $(this).data("owlItem");
sync3.trigger("owl.goTo",number);
});
function center(number){
var sync4visible = sync4.data("owlCarousel").owl.visibleItems;
var num = number;
var found = false;
for(var i in sync4visible){
if(num === sync4visible[i]){
var found = true;
}
}
if(found===false){
if(num>sync4visible[sync4visible.length-1]){
sync4.trigger("owl.goTo", num - sync4visible.length+2)
}else{
if(num - 1 === -1){
num = 0;
}
sync4.trigger("owl.goTo", num);
}
} else if(num === sync4visible[sync4visible.length-1]){
sync4.trigger("owl.goTo", sync4visible[1])
} else if(num === sync4visible[0]){
sync4.trigger("owl.goTo", num-1)
}
}
});
</script>
<link rel="stylesheet" type="text/css" href="http://owlgraphic.com/owlcarousel/owl-carousel/owl.carousel.css">
<style>
#sync1 .item{
background: #0c83e7;
padding: 80px 0px;
margin: 5px;
color: #FFF;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
border-radius: 3px;
text-align: center;
}
#sync2 .item{
background: #C9C9C9;
padding: 10px 0px;
margin: 5px;
color: #FFF;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
border-radius: 3px;
text-align: center;
cursor: pointer;
}
#sync2 .item h1{
font-size: 18px;
}
#sync2 .synced .item{
background: #0c83e7;
}
/*carousel 2 */
#sync3 .item{
background: #0c83e7;
padding: 80px 0px;
margin: 5px;
color: #FFF;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
border-radius: 3px;
text-align: center;
}
#sync4 .item{
background: #C9C9C9;
padding: 10px 0px;
margin: 5px;
color: #FFF;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
border-radius: 3px;
text-align: center;
cursor: pointer;
}
#sync4 .item h1{
font-size: 18px;
}
#sync4 .synced .item{
background: #0c83e7;
}
</style>
<div id="sync1" class="owl-carousel">
<div class="item"><h1>1</h1></div>
<div class="item"><h1>2</h1></div>
<div class="item"><h1>3</h1></div>
<div class="item"><h1>4</h1></div>
<div class="item"><h1>5</h1></div>
<div class="item"><h1>6</h1></div>
<div class="item"><h1>7</h1></div>
<div class="item"><h1>8</h1></div>
<div class="item"><h1>9</h1></div>
<div class="item"><h1>10</h1></div>
<div class="item"><h1>11</h1></div>
<div class="item"><h1>12</h1></div>
<div class="item"><h1>13</h1></div>
<div class="item"><h1>14</h1></div>
<div class="item"><h1>15</h1></div>
<div class="item"><h1>16</h1></div>
<div class="item"><h1>17</h1></div>
<div class="item"><h1>18</h1></div>
<div class="item"><h1>19</h1></div>
<div class="item"><h1>20</h1></div>
<div class="item"><h1>21</h1></div>
<div class="item"><h1>22</h1></div>
<div class="item"><h1>23</h1></div>
</div>
<div id="sync2" class="owl-carousel">
<div class="item"><h1>1</h1></div>
<div class="item"><h1>2</h1></div>
<div class="item"><h1>3</h1></div>
<div class="item"><h1>4</h1></div>
<div class="item"><h1>5</h1></div>
<div class="item"><h1>6</h1></div>
<div class="item"><h1>7</h1></div>
<div class="item"><h1>8</h1></div>
<div class="item"><h1>9</h1></div>
<div class="item"><h1>10</h1></div>
<div class="item"><h1>11</h1></div>
<div class="item"><h1>12</h1></div>
<div class="item"><h1>13</h1></div>
<div class="item"><h1>14</h1></div>
<div class="item"><h1>15</h1></div>
<div class="item"><h1>16</h1></div>
<div class="item"><h1>17</h1></div>
<div class="item"><h1>18</h1></div>
<div class="item"><h1>19</h1></div>
<div class="item"><h1>20</h1></div>
<div class="item"><h1>21</h1></div>
<div class="item"><h1>22</h1></div>
<div class="item"><h1>23</h1></div>
</div>
<!-- carousel two -->
<div id="sync3" class="owl-carousel">
<div class="item"><h1>1</h1></div>
<div class="item"><h1>2</h1></div>
<div class="item"><h1>3</h1></div>
<div class="item"><h1>4</h1></div>
<div class="item"><h1>5</h1></div>
<div class="item"><h1>6</h1></div>
<div class="item"><h1>7</h1></div>
<div class="item"><h1>8</h1></div>
<div class="item"><h1>9</h1></div>
<div class="item"><h1>10</h1></div>
<div class="item"><h1>11</h1></div>
<div class="item"><h1>12</h1></div>
<div class="item"><h1>13</h1></div>
<div class="item"><h1>14</h1></div>
<div class="item"><h1>15</h1></div>
<div class="item"><h1>16</h1></div>
<div class="item"><h1>17</h1></div>
<div class="item"><h1>18</h1></div>
<div class="item"><h1>19</h1></div>
<div class="item"><h1>20</h1></div>
<div class="item"><h1>21</h1></div>
<div class="item"><h1>22</h1></div>
<div class="item"><h1>23</h1></div>
</div>
<div id="sync4" class="owl-carousel">
<div class="item"><h1>1</h1></div>
<div class="item"><h1>2</h1></div>
<div class="item"><h1>3</h1></div>
<div class="item"><h1>4</h1></div>
<div class="item"><h1>5</h1></div>
<div class="item"><h1>6</h1></div>
<div class="item"><h1>7</h1></div>
<div class="item"><h1>8</h1></div>
<div class="item"><h1>9</h1></div>
<div class="item"><h1>10</h1></div>
<div class="item"><h1>11</h1></div>
<div class="item"><h1>12</h1></div>
<div class="item"><h1>13</h1></div>
<div class="item"><h1>14</h1></div>
<div class="item"><h1>15</h1></div>
<div class="item"><h1>16</h1></div>
<div class="item"><h1>17</h1></div>
<div class="item"><h1>18</h1></div>
<div class="item"><h1>19</h1></div>
<div class="item"><h1>20</h1></div>
<div class="item"><h1>21</h1></div>
<div class="item"><h1>22</h1></div>
<div class="item"><h1>23</h1></div>
</div>
I'm sure it's a case of a variable that needs a different name assigned to it but I can't for the life of me work out what's wrong. Any thoughts?

Having taken a look at it myself it was a simple case of renaming the "current", "num" and "number" variables in the second copy of the script. Now to name them something more meaningful!!
/* carousel two */
var sync3 = $("#sync3");
var sync4 = $("#sync4");
sync3.owlCarousel({
singleItem : true,
slideSpeed : 1000,
navigation: true,
pagination:false,
afterAction : syncPosition2,
responsiveRefreshRate : 200,
});
sync4.owlCarousel({
items : 15,
itemsDesktop : [1199,10],
itemsDesktopSmall : [979,10],
itemsTablet : [768,8],
itemsMobile : [479,4],
pagination:false,
responsiveRefreshRate : 100,
afterInit : function(el){
el.find(".owl-item").eq(0).addClass("synced");
}
});
function syncPosition2(el){
var current2 = this.currentItem;
$("#sync4")
.find(".owl-item")
.removeClass("synced")
.eq(current2)
.addClass("synced")
if($("#sync4").data("owlCarousel") !== undefined){
center2(current2)
}
}
$("#sync4").on("click", ".owl-item", function(e){
e.preventDefault();
var number2 = $(this).data("owlItem");
sync3.trigger("owl.goTo",number2);
});
function center2(number2){
var sync4visible = sync4.data("owlCarousel").owl.visibleItems;
var num2 = number2;
var found = false;
for(var i in sync4visible){
if(num2 === sync4visible[i]){
var found = true;
}
}
if(found===false){
if(num2>sync4visible[sync4visible.length-1]){
sync4.trigger("owl.goTo", num2 - sync4visible.length+2)
}else{
if(num2 - 1 === -1){
num2 = 0;
}
sync4.trigger("owl.goTo", num2);
}
} else if(num2 === sync4visible[sync4visible.length-1]){
sync4.trigger("owl.goTo", sync4visible[1])
} else if(num === sync4visible[0]){
sync4.trigger("owl.goTo", num2-1)
}
}

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