Develop Reference

Add a class with hover effect in jquery

I want creating a website with some small news on the start-page. I show only the pics and show the headline and a small sentence with an hover-effect. Unfortunately I have no experience with jQuery and my code doesn't work.
$(document).ready(function () {
$(this).removeClass("#news-container .newscontent")
});
$(document).ready(function () {
$("#news-container img").hover(function () {
$(this).addClass("#news-container .newscontent");
}, function () {
$(this).removeClass("#news-container .newscontent");
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

If you want to toggle some class or the visibility of some childs with jquery the dom stucture is key. Let's assume you got the following structure:
<div class="newscontent">
<img class="image" src="...">
<div class="text">Some text</div>
</div>
The following code registers for the hover event on every image within an element with a newcontent class. The image with the hover $(this) searches for the next element with a text class and toggles the visibility.
$('.newscontent img').hover(function(){
if ( $(this).next('.text').css('visibility') === 'visible' ){
$(this).next('.text').css('visibility', 'hidden');
}else{
$(this).next('.text').css('visibility', 'visible');
}
});
You can find a full working example here:
https://jsfiddle.net/3xy8ar96/1/

Code to click outside of element not firing

This is my code:
<div class="titfx">
<div class="clk1">CLICKME</div>
</div>
<div class="here" style="display:none;">info for here</div>
<script src="https://code.jquery.com/jquery-3.3.1.js" integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60=" crossorigin="anonymous"></script>
<script>
$(document).ready(function() {
$('.clk1').on("click", function(event) {
//first code
var here = $(this).parent(".titfx").next(".here");
here.toggle();
//second code
if (!here.is(event.target) && here.has(event.target).length === 0) {
here.hide();
}
});
});
</script>
What the first part of javascript code does: When the word "CLICKME" is clicked, then the hidden div with text "info for here" shows.
What the second part of javascript code should do: When any part of the screen that is not class="here" is clicked on, then the text "info for here" should hide. The second part of my code is unable to achieve that. I'm not sure what I'm doing wrong. Please help me fix this issue.

you need to bind two event listeners to achieve this, one for the "clk1" element, and one for the whole page.
when fires document click event, just hide the text,
when fires ".clk1" click element, you need to stop propagation first and then write the toggle behaviour.
this is my solution
$(document).ready(function() {
$('.clk1').on("click", function(event) {
//first code
event.stopPropagation();
$(".here").toggle();
});
//second code
$(document).on("click", function(event){
$(".here").hide();
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="titfx">
<div class="clk1">CLICKME</div>
</div>
<div class="here" style="display:none;">info for here</div>

Here is a potential solution. The first click binding works for the toggle logic. However, for your second scenario, you said you want it to close them if they click any where on the page, other than the two areas. In that regard, you are concerned with the click events for the body, not just the two areas.
The second logic binds to the body, and checks to see if the clicked element is a child of the .clk1 or the .here. If it is not a child of either one, it will hide the .here.
The css was added to force the page size to be larger than just the html provided so you could actually click on something not them, :)
$(document).ready(function() {
$('.clk1').on("click", function(event) {
var here = $(this).parent(".titfx").next(".here");
here.toggle();
});
$(document.body).on('click', function(event){
var clickedElement = $(event.target);
if (!clickedElement.closest('.clk1').length
&& !clickedElement.closest('.here').length) {
$('.here').hide();
}
});
});
body {
min-width: 800px;
min-height: 600px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="titfx">
<div class="clk1">CLICKME</div>
</div>
<div class="here" style="display:none;">info for here</div>

Child div affects parent div in css and triggers jquery method

I have parent div with class a "very-big-div" that nests another "container-div" that by its turn also nests another child divs. The very big div's made to act like a button and the div that come right after it is a container that appears when I click the very big div.
<div class="very-big">
<div class="container">
<!-- Some other more nested divs that has anchors and buttons -->
<div class="friend-request">
<div class="button-div">
<button class="accept">Trigger</button>
<button class="refuse">Trigger</button>
</div>
</div>
</div>
</div>
The problem is 2 things first: the css problem has not yet been solved
I assigned a hover pseudo class for the "very-big-div", and whenever I hover the "container-div" the hover properties(background-color) is applied to the "very-big-div". This is not what I intend to make, I want to only hover "very-big" div for the hover to apply.
.very-big{
background-color:green;
}
The second problem is : I have a jquery that deals with the container so it is toggled on/off by the "very-big-div"
$(document).ready(function(){
$("#container-div").hide();
$("#very-big-div").click(function(){
$("#container-div").toggle();
});
});
the container has both anchor and button tags whenever I click the an anchor or a button inside the container it is toggled to close itself, and that is not what I want, what I want is just when I only press the "very-big-div" the toggle is activated.

Same as #Jhecht has given the answer, I have just inherited his to mine.
You can stop propagation of the click of child element that trigger toggle by using target and excluding all the child elements of your .very-big container as:
$(".very-big").click(function(e) {
var target = $(e.target);
if (!target.is('.very-big *')) {
$(".container").toggle();
}
});
Code Snippet:
$(document).ready(function() {
$(".container").hide();
$(".very-big").click(function(e) {
var target = $(e.target);
if (!target.is('.very-big *')) {
$(".container").toggle();
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="very-big">
Other Text
<div class="container">
This is text to fill stuff out so I can click on it.
</div>
</div>

This works for me, but I am not sure if it is what you need.
Please add in the minimum HTML, CSS, and Javascript needed to fully recreate the error you are seeing.
$(document).ready(function() {
$(".container").hide();
$(".very-big").click(function(e) {
console.log(e);
var current = $(e.toElement);
if (current.is('.container')) {
e.stopPropagation();
return false;
}
$('.container').toggle();
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="very-big">
Other Text
<div class="container">
This is text to fill stuff out so I can click on it.
</div>
</div>

How to addClass and remove Class when clicking a link?

I'm trying to make some elements active when I click on a link. I'm at this code right now which let's me add and remove active class when I click on element with class 'test'. What I need is to click a link and have the same behaviour to the div elements.
I have:
$('.test').on('click',function(){
$('.test.active').removeClass('active');
$(this).addClass('active');
});
.active{
color: #F00;
}
<div class='test active'>test</div>
<div class='test'>test</div>
<a class='link' href=''>Click me</a>
This code adds and removes the active class when I click the divs. How to do the same thing by clicking the link?

When you click a link, the behavior and the method will be the same as if you click a button, a div, or any other element of the page.
The difference is that an <a> element will redirect you to another page (inclusive if it's "the same" where you come from) and the changes won't be noticeable.
You will need to use $("element").addClass("class");

Add href="javascript:;" if to avoid redirection.
In jQuery below snippet will work:
$('.link').on('click', function(){
$(this).toggleClass('active');
})
Working Fiddle
Update
To highlight multiple divs
$('.link').on('click', function(){
if($('.test.active').next().hasClass('test'))
{
$('.test.active').removeClass('active').next('.test').addClass('active');
}
else
{
$('.test.active').removeClass('active');
$('.test:first').addClass('active');
}
})
Updated Fiddle

Your code should be:
$('.link').on('click', function () {
var $nextActive = $('.test.active').next('.test').length ? $('.test.active').next('.test') : $('.test').first();
$('.test.active').add($nextActive).toggleClass('active');
return false;
});

You can do like following. It will add and remove active class on link click.
$('.link').on('click', function(){
$('.active').removeClass('active').siblings('.test').addClass('active');
});
.active{
color: #F00;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class='test active'>test</div>
<div class='test'>test</div>
<a class='link' href='#'>Click me</a>
Edit:
This will work for infinite div.
JQuery:
$('.link').on('click', function(){
if($('.active').next().hasClass('test'))
{
$('.active').removeClass('active').next('.test').addClass('active');
}
else
{
$('.active').removeClass('active');
$('.test:first').addClass('active');
}
});
Fiddle

Just remove .active class.
below code is working.
$('.test').click(function(){
$('.test').removeClass('active');
$(this).addClass('active');
});

replace js function
$('.test').on('click',function(){
$('.test').removeClass('active');
$(this).addClass('active');
});
Demo Link https://jsfiddle.net/ffjcfb2b/

According to your post and comments you'd like to use link as class changer for divs. Here you go. Edited!
$('.link').on('click', function(){
$('.test.active').toggleClass('active').next().addClass("active");
});
Working fiddle

How do I make this code work for each click?

I have h3 block's and on click of each of the block I am showing the section associated with it. It is actually something like accordion(hide and collapse). I have also given a drop icon to the h3 tags, means that when the block is opened the h3 should have a dropicon pointing downwards while others h3 should have there dropocons towards right. I am controlling this behaviour using backgroundPosition. I am using the jQuery visible condition to see if the particular block is visible then give its drop icon one background position and to the rest other. It works fine but only for first click. It doesn't work for second click; can somebody explain why? Here is my code:
if($(this).next().is(':visible')) {
$(this).css({'backgroundPosition':'0px 14px'});
}
else {
$("h3").css({'backgroundPosition':'0px -11px'});
}
UPDATED CODE:
$("h3").click(function() {
$(".tabs").hide();
$(this).next().show();
if($(this).next().is(':visible')) {
$(this).css({'backgroundPosition':'0px 14px'});
} else {
$("h3").css({'backgroundPosition':'0px -11px'});
}
})

If you wrap the whole block in a div it might make traversing easier.
Html:
<div class="drop-block">
<h3>Click this</h3>
<ul>
<li>Drop</li>
<li>it</li>
<li>like</li>
<li>it's</li>
<li>hot</li>
</ul>
</div>​
Jquery:
var dropper = $('.drop-block');
$(dropper).find('h3').click(function(){
$(this).toggleClass('active');
$(dropper).find('ul').toggle();
});​
Example

I Belive that you are looking for live
So it will be something like this:
$(element).live('click', function(){
if($(this).next().is(':visible')) {
$(this).css({'backgroundPosition':'0px 14px'});
}
else {
$("h3").css({'backgroundPosition':'0px -11px'});
}
}

Instead of editing the css of them, make a css class "open" (or similar), and then add / remove the class on the click to open / close.
It is much easier to debug by checking for the existence of a class than it is to check the css properties of something in JS.

Better make a class name for each situation and easly handle the action
$('h3').on('click', function(){
if($(this).hasClass('opened')) {
$(this).removeClass('opened');
}
else {
$(this).addClass('opened');
}
}

$(document).on('click', 'h3', function(e) {
$(".tabs").hide('slow');
$(this).css({'backgroundPosition':'0px 14px'});
if(!$(this).next().is(':visible'))
{
$("h3").css({'backgroundPosition':'0px -11px'});
$(this).next().show('slow');
}
});
You can remove 'slow' from show/hide if animation is not required
Here is an example.

It sounds like you need to bind click events to the h3 elements and toggle the visibility of the child elements:
$(function(){
$("h3").click(function(){
$(this).next(".tabs").toggle();
});
});
Example markup:
<h3>Item 1</h3>
<div class="tabs">
<h4>Option 1</h4>
<h4>Option 2</h4>
</div>
<h3>Item 2</h3>
<div class="tabs">
<h4>Option 1</h4>
<h4>Option 2</h4>
</div>
Here's a jsFiddle to demonstrate.