Develop Reference

will CSS transitions override each other?

I have two col-md-6 class and each contains a button in it, upon clicking, im using jQuery to toggleClass() of one between col-md-6 and col-md-12 and hide/show the other. I also use CSS transition to animate the toggling, but it would work for one class and if I click the other button, the transition is not working.
Does multiple class selector cause issue with transitions?
.hello, .bye{
-webkit-transition: width 500ms;
-moz-transition: width 500ms;
-o-transition: width 500ms;
transition: width 500ms;
}
Here's the problem in jsfiddle

Your question is a little vague, so I took it upon myself and made some necessary changes to your code, so that the end result will resemble a lot what you (most likely) have in your mind.
CSS Notes:
To avoid having #btn1 and #btn2 overflow .hello and .bye respectively, you need to use overflow: hidden.
To avoid having .hello and .bye wrapping during the transition if there's not enough room for both, you need to use: padding: 0.
If you want your buttons to remain at the exact position they were (15px indented), use: margin-left: 15px.
CSS Code:
.hello,
.bye {
padding: 0;
overflow: hidden;
-webkit-transition: width 500ms;
-moz-transition: width 500ms;
-o-transition: width 500ms;
transition: width 500ms;
}
#btn1,
#btn2 {
margin-left: 15px;
}
JS Notes:
Your code is kind of inefficient as you basically repeat the same code over and over, so I created a function for you that can be used for both buttons.
JS Code:
Check out the full JavaScript code in the following:
Codepen: → here;
jsFiddle: → here;

AngularJS - Slide Divs Up And Down With Z-Index Changes Isn't Being Respected

Please see the JSFiddle here which shows my issue: http://jsfiddle.net/mlippy/zkH7S/
I'm attempting to shuffle divs up and down a list with those divs moving up hiding the divs moving down. If you look at the fiddle, there are 5 different colored boxes that you can click to tell them to move to the top. If you click various boxes in various positions, you'll start to see the z-index of the boxes moving up not be higher than that of the boxes moving down. If you click the 3rd positioned box repeatedly, that's been a quality reproducer for me.
The angular directive myWidget is applying the indexes through classes which are being added / removed in chained addClass and removeClass calls. See below and the opposite version in the fiddle.
element.removeClass('moveDown').addClass('moveUp').css('top', (newValue * 45) + 'px');
I had thought that this meant the browser was going to complete the first chained call before moving onto the second (and so on). However in this case it doesn't appear to be doing so.
Also in the directive / below, you'll find a working solution using $timeout to delay the change to the css top value which triggers the transition. It's been commented out, but there are comments showing how to toggle to the solution in the two spots code needs to be changed. This feels like cheating / not the correct way for it to be done however. Hence the question here.
element.removeClass('moveDown').addClass('moveUp');
$timeout(function() {
element.css('top', (newValue * 45) + 'px');
}, 350);
This is my first time using AngularJS, so feel free to let me know if I'm using things incorrectly or there's a better pattern which would fix my issue.
Thanks!

You're right, there is a better way to do it.
See, your code for transition affects all properties:
.widget.moveUp {
z-index: 100!important;
-webkit-transition: all 1s ease-in-out;
-moz-transition: all 1s ease-in-out;
transition: all 1s ease-in-out;
}
.widget.moveDown {
z-index: 1!important;
-webkit-transition: all 1s ease-in-out;
-moz-transition: all 1s ease-in-out;
transition: all 1s ease-in-out;
}
So my guess is that your transition to z-index is also taking 1 second to happen.
Guessing that, I've took the liberty to change these lines of code to target a transition only on the top property, which is the only one that should be affect in your case.
.widget {
width: 100%;
height: 40px;
position: absolute;
clear: both;
z-index: 1;
-webkit-transition: top 1s ease-in-out 0s;
-moz-transition: top 1s ease-in-out 0s;
transition: top 1s ease-in-out 0s;
}
.widget.moveUp {
z-index: 100!important;
}
.widget.moveDown {
z-index: 1!important;
}
Here, I updated your FIDDLE

How to use CSS3 transitions

I have the following HTML:
<div id="welcome-content">
// Code
</div>
<div id="configure-content" style="display:none">
// Code
</div>
And (working) jquery that toggles between them:
$('.back-welcome').click(function(){
$('#welcome-content').toggle();
$('#configure-content').toggle();
});
I want to use CSS3 to create a fade effect as I toggle between them. I have tried the following:
#welcome-content, #configure-content{
-webkit-transition: all 400ms;
-o-transition: all 400ms;
-moz-transition: all 400ms;
-ms-transition: all 400ms;
-khtml-transition: all 400ms;
}
However, no animation takes place. What am I doing wrong?

The property display that assign the method toggle () can't be animated with the CSS transitions. Maybe you want to look at fadeIn() and fadeOut().
Edit
I've found this another method fadeToggle() i don't know much about it but you can search and use this:
$('.back-fade').click(function(){
$('#welcome-content').fadeToggle(2000);
$('#configure-content').fadeToggle(2000);
});
Check this demo http://jsfiddle.net/8urRp/14/ *
*I made the divs with absolute position to keep them on the same space

There can only be a transition for a CSS property from one value to another. For a fade transition, the opacity should go from 0 to one.
CSS
.foo {
opacity: 0;
transition: all 400ms;
}
.foo.active {
opacity: 1
}
JavaScript
$('.mybtn').click(function() { $('.foo').toggleClass('active'); })
See this fiddle
Now there is an annoying thing with showing an hiding elements using with CSS transitions. The transition from display: none to display: block is instant, canceling out all other transitions.
There are several ways around this. First you can just use the jQuery fadeOut function. If you do really insist in using CSS transitions have a look at this answer.

ToggleClass animate jQuery?

I have a section on my website that when a user clicks I would like it to expand, I'm using the jQuery's toggleClass for this...
expandable: function(e) {
e.preventDefault();
$(this).closest('article').toggleClass('expanded', 1000);
}
This is working fine, only I'd like to somehow animate it. In chrome my article slowly grows to the new size, only in Firefox it 'instantly' resizes itself with no animation, is there a way to have this animate?

jQuery UI extends the jQuery native toggleClass to take a second optional parameter: duration
toggleClass( class, [duration] )
Docs + DEMO

.toggleClass() will not animate, you should go for slideToggle() or .animate() method.

You can simply use CSS transitions, see this fiddle
.on {
color:#fff;
transition:all 1s;
}
.off{
color:#000;
transition:all 1s;
}

I attempted to use the toggleClass method to hide an item on my site (using visibility:hidden as opposed to display:none) with a slight animation, but for some reason the animation would not work (possibly due to an older version of jQuery UI).
The class was removed and added correctly, but the duration I added did not seem to make any difference - the item was simply added or removed with no effect.
So to resolve this I used a second class in my toggle method and applied a CSS transition instead:
The CSS:
.hidden{
visibility:hidden;
opacity: 0;
-moz-transition: opacity 1s, visibility 1.3s;
-webkit-transition: opacity 1s, visibility 1.3s;
-o-transition: opacity 1s, visibility 1.3s;
transition: opacity 1s, visibility 1.3s;
}
.shown{
visibility:visible;
opacity: 1;
-moz-transition: opacity 1s, visibility 1.3s;
-webkit-transition: opacity 1s, visibility 1.3s;
-o-transition: opacity 1s, visibility 1.3s;
transition: opacity 1s, visibility 1.3s;
}
The JS:
function showOrHide() {
$('#element').toggleClass("hidden shown");
}
Thanks #tomas.satinsky for the awesome (and super simple) answer on this post.

You should look at the toggle function found on jQuery. This will allow you to specify an easing method to define how the toggle works.
slideToggle will only slide up and down, not left/right if that's what you are looking for.
If you need the class to be toggled as well you can deifine that in the toggle function with a:
$(this).closest('article').toggle('slow', function() {
$(this).toggleClass('expanded');
});

Should have checked, Once I included the jQuery UI Library it worked fine and was animating...

CSS3 Multiple Transitions of the Same Element

I am trying to make a dropdown effect for one of my background images. I was able to do it using css3 but it's not complete.
The effect is supposed to be a curtain that drops down then sort of bounces back up a little. The problem with css3 is that I don't know how to do to transitions on the same property because the last one overrides the previous ones.
Here's my code:
ul#nav li a {
/* ADDS THE DROPDOWN CURTAIN TO THE LINKS BUT HIDDEN OFF SCREEN */
background: url(images/drape2.png) 0px -149px no-repeat;
/* CSS3 transitions */
-moz-transition: all 200ms ease-in-out;
-webkit-transition: all 200ms ease-in-out;
}
ul#nav li a:hover {
/* Action to do when user hovers over links */
background-position: 0px 0px; /* make drape appear, POOF! */
background-position: 0px -10px; /* make drape appear, POOF! */
}
Any help would be much appreciated.

You'll want to chain them with commas instead of a new line
For instance:
background-color 500ms linear, color 500ms linear;

Using cubic-bezier like this:
cubic-bezier(0, 0.35, .5, 1.3)
You can make an animation go backwards—or bounce a little.
Demo (Only works in Firefox)
Source
Edit: I also made you a Webkit only option, I don't know how compatible these two techniques are. It may also work in Firefox with the -moz browser prefixes, but I haven't tested it. This one uses keyframe animation as opposed to transitions.