George George - 3 months ago 9
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

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