Develop Reference

hover fade out transition with mouse still on it

I can't figure out how to make a fade-in/fade-out effect on a div, without the mouse leaving the div.
I'll try to explain it better:
Mouse enters object
The object fades in
After a delay the object fades out, without the mouse leaving the area.

For example you can do this in jquery:
$('#id').fadeIn(1200).delay(1000).fadeOut(400);
And if you want that on mouse on you could do this:
$('#id').hover(function() {
$('#id').fadeIn(1200).delay(1000).fadeOut(400);
});
That might not be exactly what you want, but I'm sure you can figure it out from there.

You can use the mouseover event then:
$(element).parent().mouseover(function() {
$(element).fadeIn(1200).delay(1000).fadeOut(400);
});
You mouse over on the element, it fades in.
It waits for a second.
It fades out, even if you are on the element.
Snippet
$(function () {
$(".child").css("opacity", 0);
$(".child").mouseover(function () {
$(this).animate({
opacity: 1
}, 1000).delay(1000).animate({
opacity: 0
}, 1000);
});
});
.parent {position: relative; background: #99f; height: 250px;}
.parent .child {position: absolute; top: 25%; left: 25%; width: 50%; height: 50%; background: #ccf;}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div class="parent">
<p>Stand on me?</p>
<div class="child"></div>
</div>

jquery transition effect on block

I'm trying to add an effect on a div, where once you hover over the block the block will move up. I'm using Jquery transitions as I'm aware that anything under ie10 doesnt really support css transitions. At the moment I can get it to move but there is no effect on the movement (just using css). I'm not sure how I would start to add the jquery transition.
At the moment I got it so that once you hover over the block it adds a class.
$(document).ready(function () {
$(".container").hover(function () {
$(this).toggleClass("animated-effect");
});
});
Heres my jsfiddle, I can't manage to get the code to work something up with my js:
http://jsfiddle.net/4bgj4959/

You are looking for the animate method. Note that hover method takes two parameters, the second parameter is for onmouseout (when you are done hovering).
$(document).ready(function() {
$(".container").hover(function() {
$(this).animate({
top: '20px'
})
}, function() {
$(this).animate({
top: '0px'
})
});
});
.container {
width: 500px;
height: 100px;
border: 1px solid #00c;
position: relative;
top: 0px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="container">
</div>

you code is working you didn't include jquery see updated fiddle
demo

Adding Flag to javascript (hasClass)

So I have images where when you click they expand (via css). However, I also want it so that when you click, the image will be pushed to the top of the page. From what I've heard is that if I use the toggleClass function then I need to have a flag before I initiate the animation, however, I can't seem to get it to function right.
$("img").on("click", function (){
$(this).toggleClass("selected");
if ($("img").hasClass("selected")) {
found = true;
}
var timeout = setTimeout(function () {
$('html,body').animate({
scrollTop: $('.selected').offset().top - 60
}, 100);
}, 5);
});

You should consider using CSS3 transition rather than monitoring using timers. You set transition to transition the top property. Then have the selected class alter the top by toggling it. The change will cause the animation to kick in. See this example:
HTML:
<div class="bar">weee!</div>
CSS:
.bar{
width: 100px;
height: 100px;
background: red;
position: relative;
transition: top 1s ease 0;
top: 100px;
}
.bar.selected{
top : 0px;
}
JS:
$('.bar').on('click',function(){
$(this).toggleClass('selected');
});

jquery scroller with multiple visible items

I'm trying to build a scroller using jQuery.
The items within the scroller are display:inline-block and there can be multiple items visible in the x and y planes at any given time.
Can anyone help with my scroller?
Here is a jsfiddle with what I currently have. The animated sliding isnt working. I'm trying to make all of the contents slide together outside of the wrapper while the next page of items slide in.
http://jsfiddle.net/GR9ZR/
if (~~ (counter / totalVisible) == currentPage) {
item.show();
item.animate({
"left": -(item.position().left)
});
} else {
item.animate({
"left": -(item.position().left)
});
item.hide();
}

If you want to animate the position, in your CSS you must give the element you are trying to animate a property of position: relative;.
Consider a simple example, in which I want to animate a block to move right, when I click on the document page.
Codepen sketch: http://cdpn.io/vdCth
HTML
<div class='item'></div>
CSS
.item {
background: #ccc;
display: inline-block;
height: 50px;
position: relative;
width: 50px;
}
jQuery
$('html').on('click', function(){
$('.item').animate({
left: "+=50"
}, 200, function(){
});
});
Now remove the position: relative; from your CSS, and you will see the animation no longer occurs, as demonstrated in this fork: http://cdpn.io/LcakK
Hope that helps.

Create smooth transition of block elements when removing sibling elements from DOM

I have a container that is working similar to notifications in mac os - elements are added to the queue and removed after a certain timeout. This works great but has one jarring visual side effect.
When they are removed from the DOM there is a jagged update to the UI as the next element in the stack fills the void created by the previous element. I would like the elements below in the stack to move up into that space smoothly, ideally with css3 but adding a transition: all 0.5s ease-in-out to the .notice class had no effect on the object when its sibling was remove.
Minimal JS interpertation :
$('#add').click(function(e) {
e.preventDefault();
$('#container').append('<p class="notice">Notice #</p>');
});
$('body').on('click','p.notice', function(e) {
$(this).fadeOut();
});
Better yet fiddle here :
http://jsfiddle.net/kMxqj/
I'm using a MVC framework to data-bind these objects so some native css / jQuery is preferred over a Jq plugin.

This should remove the clicked element with a fade out effect and then move everything below up smoothly. This will work for any notice div in the stack regardless of it position within the stack.
Try:
$('body').on('click','p.notice', function(e) {
$(this).fadeOut(500,function(){
$(this).css({"visibility":"hidden",display:'block'}).slideUp();
});
});
Fiddle here
Update August 7th, 2018:
As asked by one of the users about using pure JS to do the slideUp functionality, I've put together a quick demo using requestAnimationFrame to animate the height of an element. Fiddle can be found here.

jQuery's Animate() method is a great tool to learn because not only can you fade your objects in and out, but you can move them around, all at the same time.
The CSS:
.notice {
position:relative;
top:20px;
width: 100%;
height: 50px;
background-color: #ccc;
opacity:0;
}
The jQuery:
$('#add').click(function(e) {
e.preventDefault();
$('#container').append('<p class="notice">Notice #</p>');
$('.notice').animate({opacity: 1, top:0}, 1000);
});
$('body').on('click','p.notice', function(e) {
$(this).fadeOut();
});
And my jsFiddle demo

A simple way of doing this would be to animate the height and margin properties - http://jsfiddle.net/kMxqj/14/
$('#add').click(function(e) {
e.preventDefault();
$('#container').append('<p class="notice">Notice #</p>');
});
$('body').on('click','p.notice', function(e) {
$(this).animate({'height':0,'margin':'0'});
$(this).fadeOut();
});
This will animate the height and margins to 0, while also fading out the object which results in a smooth transition. Also adding overflow hidden to your notice box so any content inside is covered as the animation happens.

How about this fiddle
CSS
.notice {
width: 0;
height: 0;
background-color: #ccc;
}
JS
$('#add').click(function(e) {
e.preventDefault();
$('#container').append('<p class="notice">Notice #</p>');
$('#container p.notice:last-child').animate({
width: 100%,
height: 50px
});
});
$('body').on('click','p.notice', function(e) {
$(this).fadeOut();
});
Tweak the values as needbe, but something like this should accomplish what you'd like - it sounds like animate() might be what you want though

No JQuery:
Preferable way is with max-width:
HTML
<div id="wrapper">
<div class="myspan">
child
</div>
<div id="removable" class="myspan">
removable child
</div>
<div class="myspan">
child
</div>
<div class="">
child
</div>
</div>
CSS
.myspan {
display: inline-block;
font-size: 30px;
display: inline-block;
max-width: 200px;
transition: all 1s;
overflow: hidden;
}
.myspan:hover {
max-width: 0;
}