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Animation not being made jquery (backgroundColor)

I'm having a problem where I'm making a function in JavaScript (JQuery):
$('.login').click( function() {
$('#login-container').animate({
left: 0
}, 300, "swing", function(){
$('#login-container').animate({
backgroundColor: 'rgba(0,0,0,0.4)'
}, 2000, "swing");
});
});
Whereas "login" is a button and login-container is a big div which contains a form which people can use to login.
I'm trying to make the giant container that slides over the page only turn its background color to lower the website's exposure but it's working and as far as I know, the code is correct.
The first animation happens but the second one (referring to the backgroundColor) doesn't even start at all.
Thanks in advance
EDIT:
I've simplified my code to see if it was a problem of my syntax or JS simply not applying this animation:
$('.login').click( function() {
$('#login-container').animate({
backgroundColor: 'rgba(0,0,0,0.4)'
}, 2000, "swing");
});
And the element does not have its background-color applied, for some reason.

I don't actually get what you're trying to say here, but if you want to toggle that animation you can use $.toggle() of jquery after the user clicks.
If you want to animate this stuff, look at this documentation provided by jQuery
jQuery Animation

Javascript - how to animate scrollIntoView

I was only able to get a div on click into view with the scrollIntoView function, and it works as it should, just the way I want it, but I wonder is there a way to somehow animate it, and make it a bit slower?
I have tried with a suggestion from here:
function scroll(element, parent){
$(parent)[0].scrollIntoView(false);
$(parent).animate({
scrollTop: $(parent).scrollTop() + $(element).offset().top - $(parent).offset().top,
duration: 500,
easing: 'swing'
});
}
But it pushes the element to far up, it is not pushing it as it is on just:
$('#drawer')[0].scrollIntoView(false);

scroll = function(element, parent, time) {
$(parent).animate({
scrollTop: $(element)[0].offsetTop - $(parent)[0].offsetTop,
}, time, "swing");
}
You might want to add scrollIntoView, i don't know what that is for.
This works in jQuery 3.1.1 .

Check this out: http://demos.flesler.com/jquery/scrollTo/
Lots of options, I've used it several times with good results.

Interval doesn't clear immediately after repeating for a while

I have a bouncing arrow on my website that I created with Jquery and setInterval, like this:
bouncing = setInterval(function() {
$("div").animate({
top:"30px"
},100,"easeInCubic",function() {
$("div").animate({
top:"0px"
},100,"easeOutCubic");
});
console.log("bounced");
},200);
You can see this in place in a codepen here: http://codepen.io/mcheah/pen/wMmowr
I made it run faster than i needed because its easier to see the issues quicker. My issue is that after leaving the interval running for a few seconds, you'll notice that instead of bouncing back up or down immediately, the bouncing element will stop for half a second and then just hang there, before beginning again. If you leave it running even longer (20 seconds) and then clear the interval, you'll notice that it takes a few seconds to stop bouncing.
My questions are these:
Why does the bouncing go out of sync occasionally?
Why does the clear interval take a while to clear if it's been repeating for a while?
Is there a better way to have a bouncing arrow? Are CSS transitions more reliable?
Thanks for your help!

Your are trying to perfectly coordinate a setInterval() timer and two jQuery animations such that the two come out perfectly coordinated. This is asking for trouble and the two may drift apart over time so it is considered a poor design pattern.
If, instead, you just use the completion of the second animation to restart the first and make your repeat like that, then you have perfect coordination every time.
You can see that here in another version of your codepen: http://codepen.io/anon/pen/NxYeyd
function run() {
var self = $("div");
if (self.data("stop")) return;
self.animate({top:"30px"},100, "easeInCubic")
.animate({top:"0px"}, 100, "easeOutCubic", run);
}
run();
$("div").click(function() {
// toggle animation
var self = $(this);
// invert setting to start/stop
self.data("stop", !self.data("stop"));
run();
console.log("toggled bouncing");
});

It's not a good idea to mix animate() with timers this way. There's NO chance you can synchronize something like this. And there's no need to. You can simply append a function into the animation queue, look here: https://stackoverflow.com/a/11764283/3227403
What animate() does is put an animation request into a job queue which will be processed later, when the right time comes. When you break the interval the stuff that accumulated in the queue will still be processed. There's a method to clear the queue and stop all animation immediately.
The JQuery animation functions actually manipulate CSS, and there is nothing beyond it in HTML. Another option would be using a canvas, but it is a completely different approach and I wouldn't recommend it. With JQuery's animation your already at the best choice.
This is a simple solution to your problem:
function bounce()
{
$("div")
.animate({
top: "30px"
}, 100, "easeInCubic")
.animate({
top: "0px"
}, 100, "easeOutCubic", bounce); // this loops the animation
}
Start bouncing on page load with:
$(bounce);
Stop bouncing on click with:
$("div").click(function() {
$("div").stop().clearQueue().css({ top: "0px" });
// you want to reset the style because it can stop midway
});
EDIT: there were some inaccuracies I corrected now. The running example is on codepen now.

If you want to use javascript for animation you can use something better like the greensock tween library
http://greensock.com/docs/#/HTML5/GSAP/TweenMax/to/
something like this:
var tween = TweenMax.to($("div"), 100, {y: "100px", yoyo: true, repeat: -1});

You could wrap your interval code with:
if(!$("div").is(":animated"))
This will initiate your animation only if your previous one is finished.
The reason why it was bouncing weird is that your animations are queued.
You can check how it works now:
http://codepen.io/luminaxster/pen/XKzLBg
I would recommend using the complete callback when the second animation ends instead and have variable to control a bounce recursive call in this version:
http://codepen.io/luminaxster/pen/qNVzLY

Using jquery.effects.slide, how to combine direction, speed, and completed function?

I found jquery.effects.slide works according to what I need. But I am having trouble figuring out how to combine all possible arguments with a completed function.
For example, this basically does what I want, slide a div from left to right:
$("#companyinfo").show('slide', function(){
//do stuff here as a condition of the completed slide effect.
});
But when I introduce a speed of 500, it doesn't seem to recognize the additional argument:
$("#companyinfo").show('slide', 500, function(){});
And what if I want to change the direction?
$("#companyinfo").show('right', 'slide', 500, function(){});
The additional argument "right" breaks the slide effect.
So, I need to use show with: direction, speed, and completed function.

$("#companyinfo").show("slide", {direction: 'right'}, 500, function() {
//callbacks
});

Vanilla jQuery doesn't have slide effects, but jQuery UI does.

jQuery animation code only running first instruction?

I'm fairly certain I'm being massively stupid here, but how can I run multiple jQuery animation instructions one after the other. The code below causes my box to move away from the left hand side correctly, but does not cause it to expand down.
click : function(){
$(this).not(".break").animate({left: '100%'}, 300);
$(this).slideDown(300);
},

You can split them into two:
$(this).not(".break").animate({left: '100%'}, 300);
$(this).children().slideDown(300).hide();