CSS3 - 动画

动画是改变形状并用元素创建运动的过程。

@关键帧

关键帧将控制 CSS3 中的中间动画步骤。

带有左侧动画的关键帧示例 -

@keyframes animation {
   from {background-color: pink;}
   to {background-color: green;}
}
div {
   width: 100px;
   height: 100px;
   background-color: red;
   animation-name: animation;
   animation-duration: 5s;
}

上面的示例使用关键帧语法显示了动画的高度、宽度、颜色、名称和持续时间。

向左移动动画

现场演示

<html>
   <head>
      <style type = "text/css">
         h1 {
            -moz-animation-duration: 3s;
            -webkit-animation-duration: 3s;
            -moz-animation-name: slidein;
            -webkit-animation-name: slidein;
         }
         @-moz-keyframes slidein {
            from {
               margin-left:100%;
               width:300%
            }
            to {
               margin-left:0%;
               width:100%;
            }
         }
         @-webkit-keyframes slidein {
            from {
               margin-left:100%;
               width:300%
            }
            to {
               margin-left:0%;
               width:100%;
            }
         }
      </style>
   </head>

   <body>
      <h1>Tutorials Point</h1>
      <p>this is an example of moving left animation .</p>
      <button onclick = "myFunction()">Reload page</button>
      <script>
         function myFunction() {
            location.reload();
         }
      </script>
   </body>
</html>

它将产生以下结果 -

使用关键帧向左移动动画

现场演示

<html>
   <head>
      <style type = "text/css">
         h1 {
            -moz-animation-duration: 3s;
            -webkit-animation-duration: 3s;
            -moz-animation-name: slidein;
            -webkit-animation-name: slidein;
         }
         @-moz-keyframes slidein {
            from {
               margin-left:100%;
               width:300%
            }
            75% {
               font-size:300%;
               margin-left:25%;
               width:150%;
            }
            to {
               margin-left:0%;
               width:100%;
            }
         }
         @-webkit-keyframes slidein {
            from {
               margin-left:100%;
               width:300%
            }
            75% {
               font-size:300%;
               margin-left:25%;
               width:150%;
            }
            to {
               margin-left:0%;
               width:100%;
            }
         }
      </style>
   </head>

   <body>
      <h1>Tutorials Point</h1>
      
      <p>This is an example of animation left with an extra keyframe 
         to make text changes.</p>
      <button onclick = "myFunction()">Reload page</button>
      <script>
         function myFunction() {
            location.reload();
         }
      </script>
   </body>
</html>

它将产生以下结果 -