How to run two jQuery animations simultaneously?

Question

Is it possible to run two animations on two different elements simultaneously? I need the opposite of this question Jquery queueing animations.

I need to do something like this...

$('#first').animate({ width: 200 }, 200);
$('#second').animate({ width: 600 }, 200);

but to run those two at the same time. The only thing I could think of would be using setTimeout once for each animation, but I don't think it is the best solution.

Answer 1

yes there is!

$(function () {
    $("#first").animate({
       width: '200px'
    }, { duration: 200, queue: false });

    $("#second").animate({
       width: '600px'
    }, { duration: 200, queue: false });
});

Answer 2

That would run simultaneously yes. what if you wanted to run two animations on the same element simultaneously ?

$(function () {
    $('#first').animate({ width: '200px' }, 200);
    $('#first').animate({ marginTop: '50px' }, 200);
});

This ends up queuing the animations. to get to run them simultaneously you would use only one line.

$(function () {
    $('#first').animate({ width: '200px', marginTop:'50px' }, 200);
});

Is there any other way to run two different animation on the same element simultaneously ?

Answer 3

I believe I found the solution in the jQuery documentation:

Animates all paragraph to a left style of 50 and opacity of 1 (opaque, visible), completing the animation within 500 milliseconds. It also will do it outside the queue, meaning it will automatically start without waiting for its turn.

$( "p" ).animate({
  left: "50px", opacity: 1
}, { duration: 500, queue: false }); 

simply add: queue: false.

Answer 4

If you run the above as they are, they will appear to run simultaenously.

Here's some test code:

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script>
$(function () {
    $('#first').animate({ width: 200 }, 200);
    $('#second').animate({ width: 600 }, 200);
});
</script>
<div id="first" style="border:1px solid black; height:50px; width:50px"></div>
<div id="second" style="border:1px solid black; height:50px; width:50px"></div>

Answer 5

While it's true that consecutive calls to animate will give the appearance they are running at the same time, the underlying truth is they're distinct animations running very close to parallel.

To insure the animations are indeed running at the same time use:

$(function() {
    $('#first').animate({..., queue: 'my-animation'});
    $('#second').animate({..., queue: 'my-animation'});
    $('#first,#second').dequeue('my-animation');
});

Further animations can be added to the 'my-animation' queue and all can be initiated provided the last animation dequeue's them.

Cheers, Anthony

Answer 6

See this brilliant blog post about animating values in objects.. you can then use the values to animate whatever you like, 100% simultaneously!

http://www.josscrowcroft.com/2011/code/jquery-animate-increment-decrement-numeric-text-elements-value/

I've used it like this to slide in/out:

        slide : function(id, prop, from, to) {
            if (from < to) {
                // Sliding out
                var fromvals = { add: from, subtract: 0 };
                var tovals = { add: to, subtract: 0 };
            } else {
                // Sliding back in
                var fromvals = { add: from, subtract: to };
                var tovals = { add: from, subtract: from };
            }

            $(fromvals).animate(tovals, {
                duration: 200,
                easing: 'swing', // can be anything
                step: function () { // called on every step
                    // Slide using the entire -ms-grid-columns setting
                    $(id).css(prop, (this.add - this.subtract) + 'px 1.5fr 0.3fr 8fr 3fr 5fr 0.5fr');
                }
            });
        }

Answer 7

Posting my answer to help someone, the top rated answer didn't solve my qualm.

When I implemented the following [from the top answer], my vertical scroll animation just jittered back and forth:

$(function () {
 $("#first").animate({
   width: '200px'
}, { duration: 200, queue: false });

$("#second").animate({
   width: '600px'
}, { duration: 200, queue: false });
});

I referred to: W3 Schools Set Interval and it solved my issue, namely the 'Syntax' section:

setInterval(function, milliseconds, param1, param2, ...)

Having my parameters of the form { duration: 200, queue: false } forced a duration of zero and it only looked at the parameters for guidance.

The long and short, here's my code, if you want to understand why it works, read the link or analyse the interval expected parameters:

var $scrollDiv = '#mytestdiv';
var $scrollSpeed = 1000;
var $interval = 800;

function configureRepeats() {
   window.setInterval(function () {
       autoScroll($scrollDiv, $scrollSpeed);
   }, $interval, { queue: false });
};

Where 'autoScroll' is:

    $($scrollDiv).animate({
        scrollTop: $($scrollDiv).get(0).scrollHeight
    }, { duration: $scrollSpeed });

    //Scroll to top immediately 
    $($scrollDiv).animate({
        scrollTop: 0
    }, 0);

Happy coding!