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js 控制 css3高级运动 keyframes

 1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4     <meta charset="UTF-8"> 5     <title>Document</title> 6     <script> 7             window.onload=function(){ 8                 var arr=[-45,60,-75,90]; 9                 var i=0;10                 box.onclick=function(){11                 var ready=false;12                 i++;13                 var oH=document.getElementsByTagName(head)[0];14                 var oS=document.createElement(style);15                 oH.appendChild(oS);16                   oS.innerHTML=17                     @keyframes rotate{+18                     0%{+19                     transform: rotate(+arr[i%4]+deg);+20                     }+21                     100%{+22                     transform: rotate(-+arr[i%4]+deg);+23                     }+24                     };25                 box.style.animation=1s rotate linear;    26                 box.addEventListener(animationend,function(){27                     if(ready)return;28                     ready=true;29                     document.getElementsByTagName(head)[0].removeChild(oS);30                 },false);31                 console.log(oS.innerHTML);32                 };33 34             };35     </script>36 </head>37 <body>38     <div id="box" style="background:red; width:100px; height:100px; margin:50px auto;"></div>39 </body>40 </html>

 

js 控制 css3高级运动 keyframes