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How to fix z-index issue that does not work despite already having position & higher z-index value?

I'm trying to implement z-index change on hover but it doesn't seem to work despite already using "position" on my elements.
This is what I was trying to do (the red navigation right or left side should go under the poster element on hover using z-index):
But this is what happen instead (z-index not working):
$('.owl-carousel').owlCarousel({
loop: true,
margin: 10,
stagePadding: 50,
nav: true,
dots: false,
responsive: {
0: {
items: 1
},
600: {
items: 3
},
1000: {
items: 5
}
}
})
.owl-carousel {
position: relative;
width: 100%;
margin-top: 65px;
}
.owl-carousel .owl-stage-outer {
overflow: visible;
}
.owl-carousel .item {
position: relative;
height: 9%;
width: auto;
background: #4DC7A0;
z-index: 0;
}
.owl-nav button {
position: absolute;
top: 0;
height: 100%;
width: 50px;
z-index: 0;
color: red;
background: rgb(255 1 1 / 40%)!important;
display: block;
margin: 0!important;
}
.owl-nav button span {
color: white!important;
font-size: 51px;
}
.owl-nav .owl-next {
right: 0;
position: absolute;
z-index: 0;
}
.owl-nav .owl-prev {
left: 0;
position: absolute;
z-index: 0;
}
.owl-carousel .owl-item:hover {
transform: scale(1.4);
position: relative;
z-index: 5;
}
<link rel="stylesheet" href="https://owlcarousel2.github.io/OwlCarousel2/assets/owlcarousel/assets/owl.carousel.min.css" />
<link rel="stylesheet" href="https://owlcarousel2.github.io/OwlCarousel2/assets/owlcarousel/assets/owl.theme.default.min.css" />
<link rel="stylesheet" href="https://owlcarousel2.github.io/OwlCarousel2/assets/css/docs.theme.min.css" />
<div class="owl-carousel owl-theme">
<div class="item"><img src="https://i.imgur.com/iyp13K1.jpg"></div>
<div class="item"><img src="https://i.imgur.com/iyp13K1.jpg"></div>
<div class="item"><img src="https://i.imgur.com/iyp13K1.jpg"></div>
<div class="item"><img src="https://i.imgur.com/iyp13K1.jpg"></div>
<div class="item"><img src="https://i.imgur.com/iyp13K1.jpg"></div>
<div class="item"><img src="https://i.imgur.com/iyp13K1.jpg"></div>
</div>
<script src="https://owlcarousel2.github.io/OwlCarousel2/assets/vendors/jquery.min.js"></script>
<script src="https://owlcarousel2.github.io/OwlCarousel2/assets/owlcarousel/owl.carousel.js"></script>
As you can see on the right side, despite already using position & z index on the poster element higher than the navigation element (the red ones), the poster element still sits underneath the navigation element.
How to fix this z-index issue?

Slick Slider 2 sliders not matching slides and Slider inside Bootstrap Modal

As you can see I have 2 slick sliders running in this page, One is seen by default and the second one is triggered in a bootstrap modal when user click one of the slides of the first one. This is to see the slide individually and in bigger size . My use case is simply this and I am super close to completing: When user click any of the slide of the slider, a modal should pop up with slick slider with a 1 slideToShow option instead of 3 so the image is bigger, the slide that show on the Modal should be the same the one user clicked.
Issues.
1. When page is refreshed and user click one of the slide, the modal slider opens to with a buggy view, once i start clicking the next and previous arrow , this goes away, why is this happening?
see the bugg view:
2. How do i show the same slide the user clicker on the modal also, right now modal slider opens like a new slider and the first slide is shown all the time not the one user clicked
.stack-list-slider-slider-area {
margin-top: 30px;
}
.stack-list-slider-slider-area .stack-list-slider-slide h3 {
font-size: 15px;
text-align: center;
margin-top: 18px;
}
.stack-list-slider-slider-area button.slick-prev.slick-arrow {
position: relative;
width: 30px;
overflow: hidden;
background: transparent;
border: 0;
position: absolute;
left: 0px;
right: auto;
z-index: 11;
top: 50%;
transform: translateY(-50%);
width: 40px;
height: 40px;
}
.stack-list-slider-slider-area button.slick-prev.slick-arrow:after {
content: "<";
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
background: #00805f;
color: #fff;
display: flex;
align-items: center;
justify-content: center;
font-size: 22px;
}
.stack-list-slider-slider-area button.slick-next.slick-arrow {
position: relative;
width: 40px;
overflow: hidden;
background: transparent;
border: 0;
position: absolute;
left: auto;
right: 0px;
z-index: 11;
top: 50%;
transform: translateY(-50%);
height: 40px;
}
.stack-list-slider-slider-area button.slick-next.slick-arrow:after {
content: ">";
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
background: #00805f;
color: #fff;
display: flex;
align-items: center;
justify-content: center;
font-size: 22px;
}
.stack-list-slider-slider-area .stack-list-slider.slick-initialized.slick-slider {
position: relative;
}
.stack-list-slider-slider-area .stack-list-slider-slide {
padding: 30px 0;
}
.stack-list-slider-slider-area .slider-img img {
display: block;
width: 100%;
}
.stack-list-slider-slider-area .slick-initialized .slick-slide {
padding: 0 15px !important;
}
.stack-list-slider-slider-area .stack-list-slider.slick-initialized.slick-slider {
padding: 0 40px;
}
.stack-list-slider-modal-slider-area {
margin-top: 30px;
}
.stack-list-slider-modal-slider-area .stack-list-slider-modal-slide h3 {
font-size: 15px;
text-align: center;
margin-top: 18px;
}
.stack-list-slider-modal-slider-area button.slick-prev.slick-arrow {
position: relative;
width: 30px;
overflow: hidden;
background: transparent;
border: 0;
position: absolute;
left: 0px;
right: auto;
z-index: 11;
top: 50%;
transform: translateY(-50%);
width: 40px;
height: 40px;
}
.stack-list-slider-modal-slider-area button.slick-prev.slick-arrow:after {
content: "<";
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
background: #00805f;
color: #fff;
display: flex;
align-items: center;
justify-content: center;
font-size: 22px;
}
.stack-list-slider-modal-slider-area button.slick-next.slick-arrow {
position: relative;
width: 40px;
overflow: hidden;
background: transparent;
border: 0;
position: absolute;
left: auto;
right: 0px;
z-index: 11;
top: 50%;
transform: translateY(-50%);
height: 40px;
}
.stack-list-slider-modal-slider-area button.slick-next.slick-arrow:after {
content: ">";
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
background: #00805f;
color: #fff;
display: flex;
align-items: center;
justify-content: center;
font-size: 22px;
}
.stack-list-slider-modal-slider-area .stack-list-modal-slider.slick-initialized.slick-slider {
position: relative;
}
.stack-list-slider-modal-slider-area .stack-list-slider-modal-slide {
padding: 30px 0;
}
.stack-list-slider-modal-slider-area .slider-img img {
display: block;
width: 100%;
}
.stack-list-slider-modal-slider-area .slick-initialized .slick-slide {
padding: 0 15px !important;
}
.stack-list-slider-modal-slider-area .stack-list-modal-slider.slick-initialized.slick-slider {
padding: 0 40px;
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>Practice Html page</title>
<!-- Slick Slider CSS CDN 3.3.1-->
<link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/slick-carousel#1.8.1/slick/slick.css" />
<!-- Bootstrap CSS CDN 3.3.1-->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css">
<!-- Styles -->
<link rel="stylesheet" type="text/css" href="style.css">
</head><!-- end head -->
<body>
<div class="stack-list-slider-slider-area">
<div class="container">
<div class="stack-list-slider">
<div class="stack-list-slider-slide" data-toggle="modal" data-target="#modalId">
<div class="slider-img">
<img src="https://www.dropbox.com/s/nnbizh3joq3l71n/1.jpg?dl=1" alt="">
</div>
<h3>Product Name</h3>
</div> <!-- /.stack-list-slider-slide -->
<div class="stack-list-slider-slide" data-toggle="modal" data-target="#modalId">
<div class="slider-img">
<img src="https://www.dropbox.com/s/9k753y33lfwnnnw/2.jpg?dl=1" alt="">
</div>
<h3>Product Name</h3>
</div> <!-- /.stack-list-slider-slide -->
<div class="stack-list-slider-slide" data-toggle="modal" data-target="#modalId">
<div class="slider-img">
<img src="https://www.dropbox.com/s/9dven42pc2o012j/3.jpg?dl=1" alt="">
</div>
<h3>Product Name</h3>
</div> <!-- /.stack-list-slider-slide -->
<div class="stack-list-slider-slide" data-toggle="modal" data-target="#modalId">
<div class="slider-img">
<img src="https://www.dropbox.com/s/feqzlynvgryieh5/4.jpg?dl=1" alt="">
</div>
<h3>Product Name</h3>
</div> <!-- /.stack-list-slider-slide -->
</div> <!-- /.stack-list-slider -->
</div><!-- end container -->
</div><!-- end slider area -->
<!-- img gallary modal start -->
<div id="modalId" class="modal fade" role="dialog">
<div class="modal-dialog modal-lg">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal Header</h4>
</div>
<div class="modal-body">
<div class="stack-list-slider-modal-slider-area">
<div class="stack-list-modal-slider">
<div class="stack-list-slider-modal-slide" >
<div class="slider-img">
<img src="https://www.dropbox.com/s/nnbizh3joq3l71n/1.jpg?dl=1" alt="">
</div>
<h3>Product Name</h3>
</div> <!-- /.stack-list-slider-slide -->
<div class="stack-list-slider-modal-slide" >
<div class="slider-img">
<img src="https://www.dropbox.com/s/9k753y33lfwnnnw/2.jpg?dl=1" alt="">
</div>
<h3>Product Name</h3>
</div> <!-- /.stack-list-slider-slide -->
<div class="stack-list-slider-modal-slide" >
<div class="slider-img">
<img src="https://www.dropbox.com/s/9dven42pc2o012j/3.jpg?dl=1" alt="">
</div>
<h3>Product Name</h3>
</div> <!-- /.stack-list-slider-slide -->
<div class="stack-list-slider-modal-slide" >
<div class="slider-img">
<img src="https://www.dropbox.com/s/feqzlynvgryieh5/4.jpg?dl=1" alt="">
</div>
<h3>Product Name</h3>
</div> <!-- /.stack-list-slider-slide -->
</div> <!-- /.stack-list-slider -->
</div><!-- end slider area -->
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
<!-- img gallary modal ends -->
<!-- Loading Jquery 3.4.0 CDN -->
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
<!-- Loading Jquery 3.4.0 CDN -->
<script type="text/javascript" src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/js/bootstrap.min.js"></script>
<!-- Loading Slick Slider CDN -->
<script type="text/javascript"
src="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.9.0/slick.min.js"></script>
<script>
$(document).ready(function () {
$('.stack-list-slider').slick({
slidesToShow: 3,
slidesToScroll: 1,
autoplay: false,
arrows: true,
asNavFor: ".stack-list-modal-slider",
responsive: [
{
breakpoint: 991,
settings: {
slidesToShow: 3,
}
},
{
breakpoint: 767,
settings: {
slidesToShow: 2,
}
},
{
breakpoint: 480,
settings: {
slidesToShow: 1,
}
},
]
});
$('.stack-list-modal-slider').slick({
slidesToShow: 1,
slidesToScroll: 1,
autoplay: false,
arrows: true,
asNavFor: ".stack-list-slider",
});
});
</script>
</body>
</html>

add this section
$('#myModal').on('shown.bs.modal', function () {
//write your code here
});
full code
$(document).ready(function () {
$('.stack-list-slider').slick({
slidesToShow: 3,
slidesToScroll: 1,
autoplay: false,
arrows: true,
asNavFor: ".stack-list-modal-slider",
responsive: [
{
breakpoint: 991,
settings: {
slidesToShow: 3,
}
},
{
breakpoint: 767,
settings: {
slidesToShow: 2,
}
},
{
breakpoint: 480,
settings: {
slidesToShow: 1,
}
},
]
});
});
$('#modalId').on('shown.bs.modal', function () {
$('.stack-list-modal-slider').slick({
slidesToShow: 1,
slidesToScroll: 1,
autoplay: false,
arrows: true,
asNavFor: ".stack-list-slider",
});
});
reference is here https://codepen.io/mhfuad/pen/yLNRagb
I think this is a solution for now

Getting the "data-slick-index" when clicking the first slide and using that to set the modal slider using "slickGoTo" fixed the slide matching issue. As far as the bug goes Multiple fixes were needed
1) use "unslick" when not using modal slider and trigger modal slider only when modal is modal is open(thanks to MH Fuad), the bug seems to be happening due to multiple sliders in one page. Here is my jquery
jQuery(document).ready(function () {
jQuery('.stack-list-slider').slick({
slidesToShow: 3,
slidesToScroll: 1,
autoplay: false,
arrows: true,
infinite: true,
asNavFor: ".stack-list-modal-slider",
responsive: [
{
breakpoint: 991,
settings: {
slidesToShow: 3,
}
},
{
breakpoint: 767,
settings: {
slidesToShow: 2,
}
},
{
breakpoint: 480,
settings: {
slidesToShow: 1,
}
},
]
});
});
var clickedSlick;
jQuery('.stack-list-slider-slide').each(function () {
jQuery(this).click(function (e) {
e.preventDefault();
var test =jQuery(this).closest('.slick-active').attr('data-slick-index');
console.log(test);
clickedSlick = test;
});
})
jQuery('.stack-list-slider .stack-list-modal-slider').removeClass('slick-active');
//set active class to first thumbnail slides
jQuery('.stack-list-slider .stack-list-modal-slider').eq(0).addClass('slick-active');
jQuery('#modalId').on('shown.bs.modal', function () {
jQuery('.stack-list-modal-slider').slick({
slidesToShow: 1,
slidesToScroll: 1,
autoplay: false,
arrows: true,
infinite: true,
asNavFor: ".stack-list-slider",
});
jQuery('.stack-list-modal-slider').slick('slickGoTo', clickedSlick);
});
jQuery("#modalId").on('hidden.bs.modal', function (e) {
jQuery('.stack-list-modal-slider').slick('unslick')
});

After clicking a hamburger icon, the menu does not display above slide-show images on the main page

I do not know how to show the menu above the slide-show images after clicking the hamburger icon. I used z-index and .addClass in order to add the diplay:none property to the #slideshow. This did not work. I do not know what I can do next.
https://jsfiddle.net/ft31scgw/
main.js
<script>
$(document).ready(() => {
$('#slideshow .slick').slick({
autoplay: true,
autoplaySpeed: 2000,
dots: true,
});
});
$(document).ready(() => {
$('#userReview .slick').slick({
autoplay: true,
autoplaySpeed: 8000,
dots: true,
});
});
function hMenu() {
var menu = document.getElementById("toggle");
if(menu) {
var hide = $("#slideshow").hide();
} else {
var show = $("#slideshow").show();
}
}
</script>
style.css
enter image description here
#media only screen and (max-width: 736px) {
#slideshow {
position: relative;
top: 0px;
left: 0px;
}
#slideshow {
div {
width: 100%;
height: 300px;
img {
width: 100%;
height: auto;
}
}
}
button {
text-transform: uppercase;
font-weight: bold;
}
.logo img {
width: 80%;
max-width: 473px;
height: 50px;
}
label{
display: block;
cursor: pointer;
z-index: 10;
}
.menu {
text-align: center;
width: 100%;
display: none;
background: black;
}
.menu a {
display: block;
border-bottom: 1px solid #EAEAEB;
margin: 1;
}
#toggle:checked + .menu {
display: block;
z-index: 10;
}
#slideshow {
z-index: 0;
}
.disappear {
display:none;
z-index: -2;
}
}/* #media min-width 736px */
index.html
<div id="header">
<div class="logo">
<h1><img src="img/logo.png" widht="473px" height="50px"></h1>
</div>
<div class="nav">
<label for="toggle">☰</label>
<input type="checkbox" id="toggle" onclick="hMenu()" />
<div class="menu">
Work
About Us
Services
Blog
<span>Contact Us</span>
</div>
</div>
</div><!-- /#header -->
<section id="slideshow">
<div class="slick">
<div><img src="img/image1.jpg" alt=""></div>
<div><img src="img/image2.jpg" alt=""></div>
<div><img src="img/image3.jpg" alt=""></div>
</div>
</section>

Good to know, that z-index specifies the stack order of siblings elements. In your case <div class="header"> needs z-index greater than <section id="slideshow">. z-index only works on positioned elements, so both of them should have position:relative. I made a working example for you on jsFiddle.

Making Swiper Slider's Transition Unidirectional

I have put together an image carousel with the help of Swiper.
My carousel uses background images, bullets and vertical transition. I want this vertical transition to be unidirectional. In other words, the carousel transition direction should be upwards, regardless of the succession of the bullets clicked.
var swiper = new Swiper('.swiper-container', {
direction: 'vertical',
auto: true,
speed: 1000,
loop: true,
autoplay: {
delay: 9000,
disableOnInteraction: false,
},
pagination: {
el: '.swiper-pagination',
clickable: true,
},
controller: {
inverse: true,
}
});
.swiper-container {
position: relative;
max-width: 1200px;
margin: 0 auto;
height: 265px;
}
.swiper-wrapper {
height: 265px;
}
.swiper-slide {
transition: 1s ease-in-out;
top: 0;
width: 100%;
height: 265px;
background-repeat: no-repeat;
background-position: center center;
}
.swiper-slide img {
margin: 0 auto;
width: 620px;
height: 265px;
}
.swiper-container-vertical>.swiper-pagination-bullets {
bottom: 0;
top: auto !important;
}
.swiper-container-vertical>.swiper-pagination-bullets .swiper-pagination-bullet {
margin: 0 !important;
outline: none;
opacity: 1;
float: left;
width: 18px;
height: 18px;
background: url("https://grgs.ro/1/i/sprite.png") no-repeat -528px -502px;
}
.swiper-container-vertical>.swiper-pagination-bullets .swiper-pagination-bullet.swiper-pagination-bullet-active {
background-position: -528px -524px;
}
<link href="https://necolas.github.io/normalize.css/8.0.0/normalize.css" rel="stylesheet"/>
<link href="https://idangero.us/swiper/dist/css/swiper.css" rel="stylesheet" />
<script src="https://idangero.us/swiper/dist/js/swiper.min.js"></script>
<div class="swiper-container">
<div class="swiper-wrapper">
<a href="#" class="swiper-slide" style="background-image: url('https://picsum.photos/1200/265/?gravity=east');">
<img src="https://5.grgs.ro/images/b/c2/303073784cd9d0ee3aea0e039629ce5b.png" alt="">
</a>
<a href="#" class="swiper-slide" style="background-image: url('https://picsum.photos/1200/265/?gravity=south');">
<img src="https://5.grgs.ro/images/b/c2/303073784cd9d0ee3aea0e039629ce5b.png" alt="">
</a>
<a href="#" class="swiper-slide" style="background-image: url('https://picsum.photos/1200/265/?gravity=west');">
<img src="https://5.grgs.ro/images/b/c2/303073784cd9d0ee3aea0e039629ce5b.png" alt="">
</a>
</div>
<!-- Add Pagination -->
<div class="swiper-pagination"></div>
</div>
I have been looking for information on the Swiper website, including the forum but could not find the way to make it unidirectional. How could I do that?

Maybe this will help you, pass the parameter allowSlidePrev: false;.
I have never used Swiper but and I have no way to test so i don't know if this will solve your bullets problem but in theory this will make it unidirectional .

"Layered" slider using slick.js

I'm trying to implement a "layered" slider using slick.js.
enter image description here
I found a solution on stackoverflow but still having some problems. There (jsfiddle link) what i have right now.
The problem is that the right and left slides are cut off. I've tried to increase padding using centerPadding but it didn't work.
Maybe someone had the same problem?
I would be grateful for any advice!
$('.slider').slick({
arrows: true,
centerMode: true,
infinite: true,
centerPadding: '250px',
slidesToShow: 1,
speed: 500,
dots: false,
});
.wrapper {
width: 1170px;
background: pink;
}
.content {
width: 975px;
margin: auto;
}
.slick-slide:not(.slick-center) {
z-index: 0;
transform: scale(0.7);
}
.slick-active.slick-center+.slick-slide+.slick-slide {
z-index: 1;
}
.slick-active.slick-center+.slick-slide,
.slick-center+.slick-cloned {
z-index: 2;
}
.slick-center {
z-index: 3;
}
.slick-slide {
position: relative;
transition: transform 80ms;
}
.slider__item img {
position: relative;
transform: translateX(-50%);
left: 50%;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.8.1/slick.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/slick-carousel/1.8.1/slick.min.js"></script>
<div class="wrapper">
<div class="content">
<div class="slider">
<div class="slider__item">
<img src="https://pp.userapi.com/c834100/v834100491/58296/G8F9vgI_pr4.jpg" />
</div>
<div class="slider__item">
<img src="https://pp.userapi.com/c834100/v834100491/58296/G8F9vgI_pr4.jpg" />
</div>
<div class="slider__item">
<img src="https://pp.userapi.com/c834100/v834100491/58296/G8F9vgI_pr4.jpg" />
</div>
</div>
</div>
</div>