George George - 1 year ago 55
CSS Question

CSS3 Animating position

Consider CSS3 animation with ship moving above blue div. For some reason the ship isn't moving. The HTML is as follows:

<div id="wrapper">
<div id="sea">
<img src="ship.png" alt="ship" width="128" height="128"/>
</div>
</div>


In order to make CSS3 animation I use the following:

#wrapper { position:relative;top:50px;width:700px;height:320px;
margin:0 auto;background:white;border-radius:10px;}
#sea { position:relative;background:#2875DE;width:700px;height:170px;
border-radius:10px;top:190px; }
#sea img {
position:relative;left:480px;top:-20px;
animation:myship 10s;
-moz-animation:myship 10s; /* Firefox */
-webkit-animation:myship 10s; /* Safari and Chrome */
@keyframes myship {
from {left: 480px;}
to{left:20px;}
}
@-moz-keyframes myship {
from {left: 480px;}
to {left:20px;}
}
@-webkit-keyframes myship {
from {left: 480px;}
to{left:20px;}
}
}


The ship image isn't moving. Any help is greatly appreciated.

Answer Source

you have to declare your keyframe outside the css selector, as well as animate an absolutely positioned element.

http://jsfiddle.net/aNvSf/

your modified css looks like this:

#wrapper{
    position:relative;
    top:50px;
    width:700px;
    height:320px;
    margin:0 auto;
    background:white;
    border-radius:10px;
}
#sea{
    position:relative;
    background:#2875DE;
    width:700px;
    height:170px;
    border-radius:10px;
    top:190px;
}
#sea img{
    position:absolute;
    left:480px;
    top:-20px;
    animation:myship 10s;
    -moz-animation:myship 10s; /* Firefox */
    -webkit-animation:myship 10s; /* Safari and Chrome */               
}

@keyframes myship{
    from {left: 480px;} 
    to{left:20px;} 
}
@-moz-keyframes myship{
    from {left: 480px;} 
    to{left:20px;} 
}
@-webkit-keyframes myship{
    from {left: 480px;} 
    to{left:20px;} 
}‚Äč