Webkit and jQuery draggable jumping

user_425443 0
Viewed 19514

As an experiment, I created a few div's and rotated them using CSS3.

    .items { 
        position: absolute;
        cursor: pointer;
        background: #FFC400;
        -moz-box-shadow: 0px 0px 2px #E39900;
        -webkit-box-shadow: 1px 1px 2px #E39900; 
        box-shadow: 0px 0px 2px #E39900;
        -moz-border-radius: 2px; 
        -webkit-border-radius: 2px;
        border-radius: 2px;
    }

I then randomly styled them and made them draggable via jQuery.

    $('.items').each(function() {
        $(this).css({
            top: (80 * Math.random()) + '%',
            left: (80 * Math.random()) + '%',
            width: (100 + 200 * Math.random()) + 'px',
            height: (10 + 10 * Math.random()) + 'px',
            '-moz-transform': 'rotate(' + (180 * Math.random()) + 'deg)',
            '-o-transform': 'rotate(' + (180 * Math.random()) + 'deg)',
            '-webkit-transform': 'rotate(' + (180 * Math.random()) + 'deg)',
        });
    });

    $('.items').draggable();

The dragging works, but I am noticing a sudden jump while dragging the div's only in webkit browsers, while everything is fine in Firefox.

If I remove the position: absolute style, the 'jumping' is even worse. I thought there was maybe a difference in the transform origin between webkit and gecko, but they are both at the centre of the element by default.

I have searched around already, but only came up with results about scrollbars or sortable lists.

Here is a working demo of my problem. Try to view it in both Safari/Chrome and Firefox. http://jsbin.com/ucehu/

Is this a bug within webkit or how the browsers render webkit?

webkit css jquery javascript
8 Answers

I used a lot of the solutions to get dragging working correctly. BUT, it still reacted wrong to a dropzone (like it wasn't rotated). The Solution really is to use a parent container that is positioned relative.

This saved me soooo much time.

<div id="drawarea">
    <div class="rect-container h">
        <div class="rect"></div>
    </div>
</div> 



.rect-container {
    position:relative; 
}

Full Solution here (it's not from me): http://jsfiddle.net/Sp6qa/2/

Also I researched a lot. And its just like this, jQuery doesn't have any plans to change that current behavior in the future. All submitted tickets about that topic were closed. So just start out with having parentcontainers that are positioned relative. It works like a charm and should be futureproof.

user_30220740
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