暂停和播放CSS3动画的两种实现方法

1，直接修改animationPlayState

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        div{
            background-color: #ff0000;
            position: absolute;
            animation:mymove 4s 1;
            -moz-animation:mymove 4s 1; /* Firefox */
            -webkit-animation:mymove 4s 1; /* Safari and Chrome */
            -o-animation:mymove 4s 1; /* Opera */

            -webkit-animation-fill-mode: forwards ;
            -animation-fill-mode: forwards ;
        }
        @keyframes mymove {
            from {top: 0}
            to {top: 100px}
        }
        @-webkit-keyframes mymove {
            from {top: 0}
            to {top: 100px}
        }
    </style>
</head>
<body>
<div id="nice">nice</div>
<script>
    var nice = document.getElementById("nice");

    var prefixs = ["","o","moz","webkit"],
            div = document.createElement("div"),
            computeStyle,
            prefixAnimationPlayState;
    //获取所支持的animationPlayState，IE6,7,8不支持CSS3,就不写currentStyle的兼容代码了
    computeStyle = window.getComputedStyle(document.documentElement,"");
    prefixs.forEach(function(key){
        var prefix =  !key ? "animationPlayState" : key + "AnimationPlayState";
        if(typeof computeStyle[prefix] == "string")
            prefixAnimationPlayState = prefix;
    })

    setTimeout(function(){
        nice.style[prefixAnimationPlayState] = "paused";
    },1000);

    setTimeout(function(){
        nice.style[prefixAnimationPlayState] = "running";
    },2000);
</script>
</body>
</html>

2，修改class

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        div{
            background-color: #ff0000;
            position: absolute;
            animation:mymove 4s 1;
            -moz-animation:mymove 4s 1; /* Firefox */
            -webkit-animation:mymove 4s 1; /* Safari and Chrome */
            -o-animation:mymove 4s 1; /* Opera */

            -webkit-animation-fill-mode: forwards ;
            -animation-fill-mode: forwards ;
        }
        @keyframes mymove {
            from {top: 0}
            to {top: 100px}
        }
        @-webkit-keyframes mymove {
            from {top: 0}
            to {top: 100px}
        }

        .paused{
            -webkit-animation-play-state: paused!important;
            -moz-animation-play-state: paused!important;;
            -o-animation-play-state: paused!important;;
            -animation-play-state: paused!important;;
        }

        .running{
            -webkit-animation-play-state: running!important;;
            -moz-animation-play-state: running!important;;
            -o-animation-play-state: running!important;;
            -animation-play-state: running!important;;
        }
    </style>
</head>
<body>
<div id="nice">nice</div>
<script>
    var nice = document.getElementById("nice");

    vardiv = document.createElement("div");//通过修改class暂停
    setTimeout(function(){
        nice.className = "paused";
    },1000);

    setTimeout(function(){
        nice.className = "running";
    },2000);
</script>
</body>
</html>