How to force jQuery animations to run simultaneously? - javascript

I have a web page with animations (JQuery Animation) all over the place. A typical animation sequence may contain three or four objects animating independently at the same time. The issue I am facing is that the queuing of the animations is not predictable. Some of the animations are running simultaneously while some others are not.
I am doing something like
setTimeout(function(){
//animations
}, delay);
in many places just to try and group the animations. Even when using this, some of the animations inside the code block are not running simultaneously.
Is there any way to force animations to be run at the same time? Is there a way to fill up the queue with animations and then execute these at the same time?
Is there any comprehensive documentation of how this thing actually works?
EDIT: Sample code Warning: The code is messy
The question is looking at the code how do you know which of the animations are going to run simultaneously?

This run simultaneously (but not if there's already an ongoing animation on the object):
$('.blabla .2').animate({opacity: 0.3, fontSize: 20}, 800);
And if you want to be 100% sure that it's animated right away (notice the queue:false):
$('.blabla .1').animate({fontSize: 20},{queue:false,duration:800});
You can also do this. (It will still run simultaneously)
$('.blabla .1')
.animate({fontSize: 20},{queue:false,duration:800})
.animate({opacity: 0.4},{queue:false,duration:800});
This runs one after the other.
$('.blabla .1').animate({opacity: 0.3}, 800).animate({fontSize: 20}, 800);
So does this
$('.blabla .2').animate({opacity: 0.3}, 800, function() {
$('.blabla .3').animate({opacity: 0.3}, 800);
});
I hope that answers your question.
Sorry for all the edits, i'm new here.

Use the step option. You give it a function, and after each step of the current animation, it will execute that function. Thus you can animate there. Link to docs.

Related

Hard Javascript/jQuery Animation (Spinner/Scroller)

Okay, I'm trying to make it so when you click a button it'll spin a div with it's randomized contents and it'll slow down on stop on a specified div, now I have no idea where to start,
Here is an example of what I'm trying to do,
https://www.youtube.com/watch?v=y7jjhLUKleg
Any idea how to start? what should my priority be, jQuery or Javascript?
Kind Regards
EDIT: I'm not asking for anyone to spoonfeed me code, I just need an idea on where to start.
The animation itself can be probably solved easily using JQuery Animate functions. The animation supports easing, and the "ease out" is what you need. With some CSS, you would create some kind of viewport, and move the elements from right to left until the animation stops.
Let me help you with some starting code: http://jsfiddle.net/dfevruws/1/
The animation command is very simple:
$(function() {
$( "#items" ).animate({
left: -2000
}, {
duration: 5000,
easing: "easeOutQuad"
});
});
Probably more interesting than this is how you handle the selected item, but this is a different story, you ask for the Animation.

Momentum when pausing a tween in TweenMax

Is it possible to apply momentum when pausing a tween in TweenMax?
Using this fiddle as an example, would it be possible to slow the box down over a time span of one second when paused.
TweenMax.to('.example', 5, {
x: 1000,
ease: Linear.easeNone,
repeat: -1
});
I know this could be accomplished be creating a new tween, but it would be nice if there was a build in method for accomplishing this.
As it happens, there is a ThrowPropsPlugin provided by GSAP which does deal with momentum-based tweens.
And this ThrowPropsPlugin internally uses VelocityTracker (which is again, a utility provided by GSAP) which you can directly hook into, using its .track() method and then anytime you want to get the computed velocity, you can use .getVelocity() method of the same.
Unfortunately, I don't have a demo for you but you can take a look at the ThrowPropsPlugin demos and take it from there.
Having said that though, ThrowPropsPlugin is part of Club GreenSock.
Hope this helps.

Properly animate multiple elements with Jquery

Probably I didn't choose the best title for my question, sorry for that.
I'm pretty new with jQuery, hence with animations.
I'm just experimenting with It, but now I have a problem.
The script works like I want, but It seems a bit "buggy", I bet my code isn't optimized, at all... Plus I may be using a wrong way to achieve what I want.
One button is triggering the script (Its not supposed to be like that at the end, but momentarily I'm using this button to trigger the script), it works like a "toggle" and every time I click on "Show", a bunch of HTML is shown and two animations run:
$(".achievement_container").hide(300).show(); //shows the whole container
$(".glow").fadeIn(100).fadeOut(800); // First "brightening" effect
This one shows the whole "frame", while another animation runs for a lighting effect:
$(".ach_hover").css("left", "0px").css("opacity", "1").animate({
left: "252px",
opacity: "0"
}, 1100);
You can see a "working" example here:
http://jsfiddle.net/Frondor/6EA6W/
My problem appear after I click the "Show" button many times, the $(".ach_hover") animation start to fail and it doesn't appear, at all...
I'm not satisfied with the way I wrote this last animation, at least I think there might be a better and "standard" way to achieve this.
So I would really appreciate any suggestion from jQuery experts to "optimize" my script, and avoid any buggy behavior on it.
Thanks in advance
Try using jQuery .stop()
Stop the currently-running animation on the matched elements.
$(".ach_hover")
.css({
"left": "0px",
"opacity": "1"
})
.stop()
.animate({
left: "252px",
opacity: "0"
}, 1100);
Fiddle

AJAX loading objects/images - makes jQuery animations choppy

I am building a website that has a few animations when you load the home page (for example, the main logo and a few menus slide in from the sides of the screen). Simultaneously, I am also using AJAX in the background to start to load some images that might be viewed later. The problem with this is that when the images are loading, the animations become quite choppy. Is there any way to stop this? Or maybe give the AJAX function a lower priority so that it doesn't try to do anything when an animation is running?
Here is the current script I'm using to load these images:
$('.lightbox-container.first').load('/images/first_set/', function(){
$('.lightbox-container.second').load('/images/second_set/', function(){
$('.lightbox-container.third').load('/images/third_set/', function(){
$('.lightbox-container.fourth').load('/images/fourth_set/', function(){
$('.lightbox-container.fifth').load('/images/fifth_set/', function(){
$('.lightbox-container.sixth').load('/images/sixth_set/');
});
});
});
});
});
An all of my animation function look something like:
$('.third-section').animate({ 'opacity': '1', 'height': '200px', 'padding-top': '20px', }, 500);
The problem
Since all your ajax and js animations run on the same browser thread, you are bound to have this problems. You are reaching the limits of your CPU, which causes the choppiness.
How to solve this
Use CSS3 transforms. Those are hardware accelerated in all modern browsers and run on a separate threads, so their performance is generally not affected by ajax calls. Since you said you only slide things around, I think this would be the ideal solution for you. There is a great article about it here:
http://www.html5rocks.com/en/tutorials/speed/high-performance-animations/
Your case
So to actually make this work for you. Leave the ugly ajax calls as they are for now. Instead of using jQuery animate, you need 2 states - the initial, which positions the slide away and one with an extra class, which positions your slide in it's target place.
All you have to do is add the class to the slide and it will nicely come in place. Theory is simple.
Sample
Your initial state could be something like this:
.slide {
transform: translate(-400px, -200px);
transition: all 5s;
}
And the one to show in place:
.slide.show {
transform: translate(0px, 0px);
}

Improving smoothness of multiple jQuery animations

I created this multi-layered animation that takes 4 images ("layers") and animates them to "zoom away". It usually runs smoothly but once in a while when the 3rd layer starts, the 2nd layer animation kind of lags. I'm not really sure why/when the lag happens - maybe due to GPU processing?
http://jsfiddle.net/3EwnB/3/
Is there anything I can do to reduce any animation lag?
And if there's a better way to achieve this effect I'm not stuck on using jQuery.animate - alternate suggestions are welcome.
The code for the jQuery animation (for 1 of the 4 layers):
setTimeout(function() {
$('#animation-layer-2').show().animate({
opacity: '0.9',
marginLeft: '-490px',
marginTop: '25px',
width: '950px'
}, { duration: 400, queue: false });
}, 500)
Also, in the JS Fiddle example, the images are 9-17kb but that actual images I'm using are 131-457kb. The image sizes don't seem to make much of a difference though.

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