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Trying to filter non-hovered elements with jquery

I have an image gallery. Basically I am trying to go for something that lets the hovered image maintain its styling properties but the background (non-hovered images, I should say) filter to grayscale.
This is my first project and I am trying to push myself. I am making some mistakes but learning from each one. Your help is appreciated.
HTML:
<section id="image-gallery">
<div class="container">
<div id="imageboxing" class="disciplines">
<img src="images/martial-arts-banner/boxing.png">
<div class="imagetext">
<h3>BOXING</h3>
</div>
</div>
<div id="imagekb" class="disciplines">
<img src="images/martial-arts-banner/kickboxing.png">
<div class="imagetext">
<h3>KICKBOXING</h3>
</div>
</div>
<div id="muaythai" class="disciplines">
<img src="images/martial-arts-banner/muaythai.png">
<div class="imagetext">
<h3>MUAYTHAI</h3>
</div>
</div>
<div id="wrestling" class="disciplines">
<img src="images/martial-arts-banner/wrestling.png">
<div class="imagetext">
<h3>WRESTLING</h3>
</div>
</div>
<div class="clear"></div>
</div>
</section>
JQUERY:
$(document).ready(function() {
$(".disciplines img").hover(function(){
var images = $(".disciplines img");
$(this).toggleClass("active-image");
$(this).css("cursor", "pointer");
$(this).next().find('h3').slideToggle();
if (images.not(".active-image") {
$(images).css("filter", blur("20px"));
}
});

You have to do it like below:-
$(document).ready(function() {
$("#image-gallery img").hover(function(){ // on hover of image
$(this).toggleClass("active-image");
$(this).css("cursor", "pointer");
$(this).parent().css({"filter": ""}); //remove it's parent filter css
$('img').not($(this)).parent().css({"filter":'blur(5px)'}); //add filter css to all othe images parent-div apart from thr current clicked-one
}, function () { //when hover-out
$('.disciplines').css({"filter": ""}); //remove filter css from all div
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<section id="image-gallery">
<div class="container">
<div id="imageboxing" class="disciplines">
<img src="https://ae01.alicdn.com/kf/HTB1dizJKFXXXXa_XFXXq6xXFXXXs/Closed-Type-Boxing-Helmet-Head-Protector-For-Taekwondo-Karate-Tai-MMA-Muay-Thai-Kickboxing-Competition-Training.jpg_50x50.jpg">
<div class="imagetext">
<h3>BOXING</h3>
</div>
</div>
<div id="imagekb" class="disciplines">
<img src="http://www.days-gym.com/wp-content/uploads/2015/11/days-gym-website-logo.png">
<div class="imagetext">
<h3>KICKBOXING</h3>
</div>
</div>
<div id="muaythai" class="disciplines">
<img src="https://i.pinimg.com/favicons/50x/ded1fa7e09a93f576a8dc1060fbf82f7e63076e47a08abd0cf27887f.png?ca1416448b5d5bfb6c7465ba2cb5e0d4">
<div class="imagetext">
<h3>MUAYTHAI</h3>
</div>
</div>
<div id="wrestling" class="disciplines">
<img src="https://iawrestle.files.wordpress.com/2017/06/screen-shot-2017-06-14-at-10-35-09-am.png?w=50&h=50&crop=1">
<div class="imagetext">
<h3>WRESTLING</h3>
</div>
</div>
<div class="clear"></div>
</div>
</section>

Hide parent div class if child div class does not have content when there are multiple parent divs with the same class name

I have a slider where some of the images in the slider can have an optional photo- credit containing text or link in a popper. I would like to iterate over all of the popper instances and if all of the p tags in the .photo-credit p class are empty, then hide only that instance of the parent popper. I've tried to piece together a solution from some other posts, but have not been able to get it to work. The code I have does not hide a popper if all p tags are empty for that popper. I'm a JavaScript newbie and would appreciate any help.
HTML
<div class="slider-wrapper">
<!--Required Root Element-->
<div class="slider">
<!--Required List Element-->
<div class="slider-list">
<div class="slider-item">
<div class="slider-image-container"><img class="slider-image" src="http://www.someurl.com/Images/Homepage Images/Slider/image1.jpg" /></div>
<div class="slider-content-container">
<h1>B LIne: The Place to Be</h1>
<div class="learn-more">Learn More</div>
</div>
<div class="popper">
<img data-toggle="popover" class="photo-credit-icon" src="http://www.someurl.com/icon-photography.svg" alt="photo credit" />
</div>
<div class="photo-credit hide">
<p><p>A photo credit.</p></p>
<p></p>
</div>
</div><div class="slider-item">
<div class="slider-image-container"><img class="slider-image" src="http://www.someurl.com/Images/Homepage Images/Slider/anotherimage.jpg" /></div>
<div class="slider-content-container">
<h1>July 4th: You missed it!</h1>
<div class="learn-more">Learn More</div>
</div>
<div class="popper">
<img data-toggle="popover" class="photo-credit-icon" src="http://www.someurl.com/icon-photography.svg" alt="photo credit" />
</div>
<div class="photo-credit hide">
<p></p>
<p></p>
</div>
</div><div class="slider-item">
<div class="slider-image-container"><img class="slider-image" src="http://www.someurl.com/Images/Homepage Images/Slider/anotherimage.jpg" /></div>
<div class="slider-content-container">
<h1>Festival coming Aug. 31st!</h1>
<div class="learn-more">Learn More</div>
</div>
<div class="popper">
<img data-toggle="popover" class="photo-credit-icon" src="http://www.someurl.com/icon-photography.svg" alt="photo credit" />
</div>
<div class="photo-credit hide">
<p></p>
<p></p>
</div>
</div>
</div>
</div>
<img src="http://www.someurl.com/images/icons/icon-chevron-left-slider.svg">
<img src="http://www.someurl.com/images/icons/icon-chevron-right-slider.svg">
<p class="slider-pagination"></p>
</div>
JavaScript
$('.popper').each(function () {
//var $thisPopper = $(this);
var hasContent = 0;
$('.photo-credit p').each(function () {
if($(this).html().length > 0) {
hasContent++;
}
});
if(hasContent > 0){
//$thisPopper.hide();
$(this).hide();
}
});

You were on the right direction. However a couple mistakes in your javascript.
You tried to target all the div with "popper" class. However, the div with "popper" and "photo-credit" are on the same level. Why not targeting their parent div instead?
Try this code. It's been tested (Link to jsfiddle)
$('.slider-item').each(function () {
var thisSilerItem = $(this);
var hasContent = 0;
thisSilerItem.find('.photo-credit p').each(function () {
if($(this).html().length > 0) {
hasContent++;
}
});
if(hasContent <= 0){
thisSilerItem.find('.popper').hide();
}
});
Edit:
Bonus:
If your page has a large amount of sliders, this jquery solution will cause some UX issues ("jumpy" div on/after page load)
Try a CSS only solution.
When you render your DOM elements. Add a class to "popper" div if the content of "photo-credit" is empty.
<div class="popper hide">
// img
</div>
Then in your CSS, add
.popper.hide { display: none; }

It's hard to fully gather what you want to do, but if I understand correctly...
$('.popper').each(function () {
var photoCredit = $(this).find(".photo-credit p")
if ( $(photoCredit).is(':empty') ){
$(this).hide();
}
});
It's worth pointing out that CSS4 developers are working on a 'has' selector but as of July 2017 there is no support for any browser just yet.
It is expected to work in the following manner:
.popper:has(> p:empty) { display: none }
I hope this helps... :)

You can check this code.
$.each($('.popper'), function (index, popper) {
var isEmptry = true;
$.each($(popper).next('.photo-credit').children(), function (index, ptag) {
if ($.trim($(ptag).html()) != '')
isEmptry = false;
});
if (isEmptry)
$(popper).hide();
});
Working code
$.each($('.popper'), function (index, popper) {
var isEmptry = true;
$.each($(popper).next('.photo-credit').children(), function (index, ptag) {
if ($.trim($(ptag).html()) != '')
isEmptry = false;
});
if (isEmptry)
$(popper).hide();
});
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<div class="slider-wrapper">
<!--Required Root Element-->
<div class="slider">
<!--Required List Element-->
<div class="slider-list">
<div class="slider-item">
<div class="slider-image-container">
<img class="slider-image" src="http://www.someurl.com/Images/Homepage Images/Slider/image1.jpg" />
</div>
<div class="slider-content-container">
<h1>B LIne: The Place to Be</h1>
<div class="learn-more">Learn More</div>
</div>
<div class="popper">
<img data-toggle="popover" class="photo-credit-icon" src="http://www.someurl.com/icon-photography.svg" alt="photo credit" />
</div>
<div class="photo-credit hide">
<p>
<p>A photo credit.</p>
</p>
<p></p>
</div>
</div>
<div class="slider-item">
<div class="slider-image-container">
<img class="slider-image" src="http://www.someurl.com/Images/Homepage Images/Slider/anotherimage.jpg" />
</div>
<div class="slider-content-container">
<h1>July 4th: You missed it!</h1>
<div class="learn-more">Learn More</div>
</div>
<div class="popper">
<img data-toggle="popover" class="photo-credit-icon" src="http://www.someurl.com/icon-photography.svg" alt="photo credit" />
</div>
<div class="photo-credit hide">
<p></p>
<p></p>
</div>
</div>
<div class="slider-item">
<div class="slider-image-container">
<img class="slider-image" src="http://www.someurl.com/Images/Homepage Images/Slider/anotherimage.jpg" />
</div>
<div class="slider-content-container">
<h1>Festival coming Aug. 31st!</h1>
<div class="learn-more">Learn More</div>
</div>
<div class="popper">
<img data-toggle="popover" class="photo-credit-icon" src="http://www.someurl.com/icon-photography.svg" alt="photo credit" />
</div>
<div class="photo-credit hide">
<p></p>
<p></p>
</div>
</div>
</div>
</div>
<a href="#" class="slider-control-prev">
<img src="http://www.someurl.com/images/icons/icon-chevron-left-slider.svg"></a>
<a href="#" class="slider-control-next">
<img src="http://www.someurl.com/images/icons/icon-chevron-right-slider.svg"></a>
<p class="slider-pagination"></p>
</div>

Expand / Show and hide div element in a listview

As you can see, is this a list view and my mission is when you click on an element / div then the div with the images expand / show. Now that is easy, even for a backend developer, but I would like to:
1. when I click again on the same element, then the element will hide.
2. When I click on another element, then the element that is already expand will hide and the other element that I click on, will expand / show.
I need Script and CSS for this please.
<div class="row">
#foreach(var post in CurrentPage.Children)
{
<div class="col-md-12">
<div class="content equal" onclick="showhide()">
<a href="#post.Url">
<div class="date">#post.CreateDate.ToLongDateString()</div>
<h2>#post.Name</h2>
<p>#Umbraco.Truncate(post.Introduction, 240, true)</p>
</a>
</div>
<div class="images(-expand)">
<img src="#post.Image" />
</div>
</div>
}
</div>

Try as follows.
$('.content.equal').click(function() {
$('.content.equal').not(this).next().slideUp();
$(this).next().slideToggle();
});
$('.content.equal a').click(function(event) {
event.preventDefault();
});
.images {
display: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="col-md-12">
<div class="content equal">
<a href="#post.Url">
<div class="date">12-01-2017</div>
<h2>Name1</h2>
<p>#Umbraco.Truncate(post.Introduction, 240, true)</p>
</a>
</div>
<div class="images">
<img src="http://i164.photobucket.com/albums/u8/hemi1hemi/COLOR/COL9-6.jpg" />
</div>
</div>
<div class="col-md-12">
<div class="content equal">
<a href="#post.Url">
<div class="date">12-01-2017</div>
<h2>Name1</h2>
<p>#Umbraco.Truncate(post.Introduction, 240, true)</p>
</a>
</div>
<div class="images">
<img src="http://i164.photobucket.com/albums/u8/hemi1hemi/COLOR/COL9-6.jpg" />
</div>
</div>
<div class="col-md-12">
<div class="content equal">
<a href="#post.Url">
<div class="date">12-01-2017</div>
<h2>Name1</h2>
<p>#Umbraco.Truncate(post.Introduction, 240, true)</p>
</a>
</div>
<div class="images">
<img src="http://i164.photobucket.com/albums/u8/hemi1hemi/COLOR/COL9-6.jpg" />
</div>
</div>

JS: fullpage.js moveTo() among different section

CONTEXT:
I'm trying to move between different slides within a section of fullpage.js by clicking one of 5 elements.
PROBLEM:
The first moveTo() - from first slide to any of the other 4 works perfectly. However, once on any other slide, I cannot navigate to other slides by clicking any of the elements. Any help would be appreciated!
My JS:
$(document).ready(function() {
// move to quality
$( "#q" ).click(function() {
$.fn.fullpage.silentMoveTo('why', 1);
});
$( "#d" ).click(function() {
$.fn.fullpage.silentMoveTo('why', 2);
});
$( "#p" ).click(function() {
$.fn.fullpage.silentMoveTo('why', 3);
});
$( "#z" ).click(function() {
$.fn.fullpage.silentMoveTo('why', 4);
});
$( "#e" ).click(function() {
$.fn.fullpage.silentMoveTo('why', 5);
});
});
$('#fullpage').fullpage({
css3: true,
sectionsColor: ['white', 'grey', '#fff', '#fff'],
anchors:['m', 'why',],
navigation: true,
navigationPosition: 'right',
// verticalCentered:false
// 'navigationTooltips': ['fullPage.js', 'Powerful', 'Amazing', 'Simple'],
// 'showActiveTooltip': true,
}
);
My Html:
<div id="fullpage" class="fullpage-wrapper">
<div class="section" id="section1">
<div class="slide" id="slide1-1">
</div> <!-- End slide -->
</div>
<!-- Start section 2 - why -->
<div class="section" id="section2">
<div class="slide" id="slide2-1"> <!-- Start Why -->
<div class="container-fluid">
<div class="row">
<div class="col-md-12">
<h2 class="master-side side-default"><span>Why ?</span></h2>
<div class="col-md-8 col-center">
<a id="q" class="square img-thumbnail"> </a>
<a id="d" class="square"> </a>
<a id="p" class="square"> </a>
<a id="d" class="square"> </a>
<a id="e" class="square"> </a>
</div>
</div> <!-- End col-md-12 -->
</div> <!-- End Row -->
</div> <!-- End Container -->
</div> <!-- End Why -->
<div class="slide" id="slide2-2"> <!-- Start Quality -->
<div class="container-fluid">
<div class="row">
<div class="col-md-12">
<h2><span>Quality</span></h2>
<div class="col-md-8 col-center">
<a id="q" class="square img-thumbnail"> </a>
<a id="d" class="square"> </a>
<a id="p" class="square"> </a>
<a id="d" class="square"> </a>
<a id="e" class="square"> </a>
</div>
</div> <!-- End col-md-12 -->
</div> <!-- End Row -->
</div> <!-- End Container -->
</div> <!-- End Quality -->

Don't you get any errors in your javascript console?
In the code you posted there's a mistake here:
// move to quality
$( "#q").click(function() {
$.fn.fullpage.silentMoveTo('why', 1);
});
You forgot to close the string "#q".
Also, you can not have more than one id element with the same value... You can not have two <a id="d" class="square"> </a> like you do now.
If that's not the problem, you should add a reproduction of the issue online, because otherwise nobody will be able to know where the problem is and therefore how to help you.

resizeFix reInit sliders

end developer. I have little problem with sliders in tabs. My sliders work but while i switch to second slider I can't see it. slider lost width and height If I resize site by responsive tools of firefox slider generates width and height. I used resizeFix() and reInit() but doesn't work
Can Anybody Help Me?
HTML
<ul id="tabs-wrapper" class="nav nav-tabs" data-tabs="tabs">
<li id="tabs-button" class="active">Projects</li>
<li id="tabs-button">Shots</li>
</ul>
</div>
<!-- Tab panes -->
<div class="tab-content">
<!-- First slider -->
<div class="tab-pane fade in active" id="home">
<div class="device">
<div class="arrows">
<a class="arrow-left al1" href="#"></a>
<a class="arrow-right ar1" href="#"></a>
</div>
<div class="swiper-container s1">
<div class="swiper-wrapper" style="width:100%; height:100%;">
<div class="swiper-slide">
<div class="content-slide">
<h3 class="title">Slide with HTML</h3>
website
</div>
<img class="img-work" src="images/drop1.jpg">
</div>
<div class="swiper-slide">
<div class="content-slide">
<h3 class="title">Slide with HTML</h3>
website
</div>
<img class="img-work" src="images/nu.jpg">
</div>
</div>
</div>
<div class="pagination p1"></div>
</div>
</div>
<!-- Second slider -->
<div class="tab-pane fade" id="profile">
<div class="device">
<div class="arrows">
<a class="arrow-left al2" href="#"></a>
<a class="arrow-right ar2" href="#"></a>
</div>
<div class="swiper-container s2">
<div class="swiper-wrapper" style="width:100%; height:100%;">
<div class="swiper-slide">
<div class="content-slide">
<h3 class="title">Slide with HTML</h3>
website
</div>
<img class="img-work" src="images/drop1.jpg">
</div>
<div class="swiper-slide">
<div class="content-slide">
<h3 class="title">Slide with HTML</h3>
website
</div>
<img class="img-work" src="images/nu.jpg">
</div>
</div>
</div>
<div class="pagination p2"></div>
</div>
</div>
CSS
.swiper-container {
width: auto;
height: auto;
cursor: default !important;
min-height: 729px !important;
}
JS
<script>
var Swiper1 = new Swiper('.s1',{
pagination: '.p1',
loop:true,
grabCursor: true,
paginationClickable: true
})
$('.al1').on('click', function(e){
e.preventDefault()
Swiper1.swipePrev()
})
$('.ar1').on('click', function(e){
e.preventDefault()
Swiper1.swipeNext()
})
var Swiper2 = new Swiper('.s2',{
pagination: '.p2',
loop:true,
grabCursor: true,
paginationClickable: true
})
$('.al2').on('click', function(e){
e.preventDefault()
Swiper2.swipePrev()
})
$('.ar2').on('click', function(e){
e.preventDefault()
Swiper2.swipeNext()
})
$('#shots_button').on('click', function() {
Swiper2.resizeFix() ;
Swiper2.reInit() ;
});
</script>

You need to use 'update' method on Swiper instance for latest versions of Swiper in place of something like reInit() or resizeFix().
Tested on Swiper 3.4.2:
$('a[data-toggle="tab"]').on('shown.bs.tab', function (e) {
slider.update();
}

Ok i did the porblem was it bootstrap tabs i used this code
$('a[data-toggle="tab"]').on('shown.bs.tab', function (e) {
slider2.resizeFix(true);
slider1.resizeFix(true);