Develop Reference

jQuery slide out issue

I am having an issue with some jQuery animations. I managed to make my flex sidebars slide in great but I am having some issue with the slide out effects. The slide out function is making the sidebars instantly vanish.
Also, I believe I need the hide() and show() functions because with just min/max-width the sidebars make the flex canvas very tall.
My slide out functions:
$('#close-left').click(function(event){
$('#left').animate({
'min-width': '0px',
'max-width': '0px',
}, 1250).hide();
});
$('#close-right').click(function(event){
$('#right').animate({
'min-width': '0px',
'max-width': '0px',
}, 1250).hide();
});
I made a quick fiddle that is producing the same issues: https://jsfiddle.net/89s5tsLr/
Update: I made a second fiddle showing how the right sidebar causes the flex canvas to be way too tall without the hide() function being called.
https://jsfiddle.net/soq6webp/1/
Thanks in advance for the help =)

remove the .hide()
That's what instantaneously making them disappear and messing up your animation.
--
EDIT: After our exchange in the comments I came to the conclusion that given your circumstances, you may not be able to do what you have in mind, so instead what you can do is:
Slide out animation first
Then show the content
$('#right').show().animate({ css to change here }, {
duration: 1250,
complete: function() {
// once animation is over, run all the code in this block
}
Check out this JsFiddle
The 2nd object passed to an animate function is options and one of these is complete which call the code once the animation is over.
So we animate the text in this anonymous function so that it's called once the animation on the #right div is over.
We do the same on the close button except we hide away our text first, then slide away the div.
(note the changes in the CSS as well)

Row of blocks - click on one and the rest slide off the screen

I have a row of blocks. When one is clicked, I want the rest to slide off the screen and have the clicked box in the first position.
for example
I tried to mess with jQueryUI slide but it didn't seem to help. Here is a JS Fiddle showing the original blocks. Maybe I need to position them differently than floating? I thought about trying to move the distance left and off the screen but the animation looked awful.
$('.block').on('click', function() {
$('.block').not($(this)).hide("slide", { direction: "left" }, 500, function() {
});

$(document).ready(function(e) {
$('.block').each(function(item) {
$(this).click(function() {
$('.block').not($(this)).hide('slide', {direction: 'left'}, 500);
})
});
})
You still need to include jQueryUi, bellow jQuery, in order to achieve the slide effect.

Why is my jQuery transition is glitchy?

I have a jQuery transition with a css overlay that will work fine if the user mouses over for a second or more....however if the user mouses over quickly then the overlay text stays put without the overlay background. Here is my jQuery code:
$(".cascade-t1").hover(function(){
$(".cascade-corner").fadeOut();
$(".overlay-t1").animate({"left": "-300px"}, 300, function(){
$(".cascade-overlay-content").fadeIn(200);
});
}, function(){
$(".cascade-corner").fadeIn();
$(".cascade-overlay-content").fadeOut(200, function(){
$(".overlay-t1").animate({"left": "130px"}, 300);
});
});
Here is the script in action

It looks like the issue is that you don't fadeIn() the .overlay-t1 text until the mouseenter animation is done, and on mouseleave you fadeOut() the text out right away before the animation. When you move your mouse in and out faster than initial the animation the code will fade out the text and then fade it in again (the issue you're seeing).
One possible solution is to slightly alter your bottom (mouseleave) function to resemble your top (mouseenter) function more closely. Something like:
$(".cascade-corner").fadeIn();
$(".overlay-t1").stop(true, true).animate({"left": "130px"}, 300, function () {
$(".cascade-overlay-content").fadeOut(200);
});
The .stop() is there to keep the animation from playing over and over when someone spams the box.
FIDDLE DEMO

Not sure how jquery animate works under the hood but it's possible it's using javascript to animate instead of css transitions. The benefit of css transitions is that it does all of the animation calculations before the animation begins and is hardware accelerated. Javascript is at the mercy of the scheduler at a very high level so it will always be choppy.
Try jquery transit.
http://ricostacruz.com/jquery.transit/

Smoothly Fade In Entire Web Page With MooTools

I want to fade in an entire web page after all its elements finished loading. The web page includes the background image repeated left to right, and the main content area with some text and pictures. I assume I should set body opacity to 0 in CSS, and use JavaScript code to fade in the page.
I have to use MooTools, more specifically, version 1.2.6, because that library is already linked to the page (and shouldn't be upgraded to a more recent version, for a number of reasons).
One of the StackOverflow experts suggested this MooTools snippet as a solution:
window.addEvent('load', function() {
$$('body').set('morph', {duration: 300}).morph({'opacity': '1'});
});
PROBLEM: for some reason, instead of smoothly fading in the page, the snippet makes the background appear right away, and then, a second or so later, the page pops up, without any fade-in effect. Most likely it's me who's not doing things right.
I'd appreciate a bit of advice from a knowledgeable person.

The answer to your question is to do the following.
Remove the CSS opacity:0; in the stylesheet and use this code adjusted from yours
I increased from 300 to 3000 which in seconds is from .3seconds to 3seconds.
chained:
window.addEvent('load', function () {
$$('body').fade('hide').set('morph', {
duration: 3000
}).morph({
'opacity': '1'
});
});
expanded:
window.addEvent('load', function () {
var el = $$('body');
el.fade('hide'); // hide body tag
el.set('morph', {duration: 3000});
$$('body').morph({'opacity': '1'});
});
Notice:
I do agree with LifeInTheGrey about bad practice, but i said i would answer your question.

Animate a div after scrolling away from the top of the webpage

I'm currently trying to make a div appear from behind another div after the user scrolls away from the top of the page.
I'm hoping to do this using animate so that it slides out. Like this...
http://jsfiddle.net/xaYTt/99/
But I can't figure out how to make the red box stay behind the blue box until the user scrolls away from the top of the page.
I also need to reverse this when the user scrolls back up to the top of the page, so the red box slides back under the blue box again.
Can anyone help me out?

This is not the most elegant solution, but it works nonetheless.
http://jsfiddle.net/37LZ5/
Components:
Use $(document).scroll as a trigger to know when scrolling
Use scrollTop() to know how far we're scrolling (0 = top)
Remember state to make sure animation doesn't get triggered a zillion times (var away)
Use .stop() to prevent weird behaviour when halfway through one animation, another animation gets triggered

I think you are looking for this take a look at this demo
Working demo
Code
$(document).ready(function(){
//$('#bottom-box').animate({'margin-top': '200px'}, 1500);
$('body').hover(function(){
$('#bottom-box').animate({'margin-top': '200px'}, 1500);
}, function(){
$('#bottom-box').animate({'margin-top': '50px'}, 1500);
});
});

If my understanding about your question is correct, this is what you are looking for
Since you said, "User scrolls away from the top of the page", I added a div to be at the top of the page.
var isAlreadyOut=false;
$("#divPageTop").mouseover(function(){
if( isAlreadyOut==true)
{
$('#bottom-box').animate({'margin-top': '60px'}, 1500);
isAlreadyOut=false;
}
else
{
$('#bottom-box').animate({'margin-top': '200px'}, 1500);
isAlreadyOut=true;
}
});
Here is the jsfiddle version
http://jsfiddle.net/xaYTt/103/

I did something with jsFiddle that might be what you are after, if I understood your question correctly.
Basically, the red box will animate when you scroll the window more than the distance of the blue box.
Not 100%, just a quick mock up to see if that's what you want.
(When you scroll, click on the scroll bar arrows for more accurate results)
Demo here: http://jsfiddle.net/peduarte/xaYTt/104/