CSS3 动画

在 @keyframes 中创建动画时,请把它捆绑到某个选择器,否则不会产生动画效果。

通过规定至少以下两项 CSS3 动画属性,即可将动画绑定到选择器:

  • 规定动画的名称
  • 规定动画的时长

实例

把 "myfirst" 动画捆绑到 div 元素,时长:5 秒:

div
{
animation: myfirst 5s;
-moz-animation: myfirst 5s;    /* Firefox */
-webkit-animation: myfirst 5s;    /* Safari 和 Chrome */
-o-animation: myfirst 5s;    /* Opera */
}

当动画为 25% 及 50% 时改变背景色,然后当动画 100% 完成时再次改变:

@keyframes myfirst
{
0%   {background: red;}
25%  {background: yellow;}
50%  {background: blue;}
100% {background: green;}
}

@-moz-keyframes myfirst /* Firefox */
{
0%   {background: red;}
25%  {background: yellow;}
50%  {background: blue;}
100% {background: green;}
}

@-webkit-keyframes myfirst /* Safari 和 Chrome */
{
0%   {background: red;}
25%  {background: yellow;}
50%  {background: blue;}
100% {background: green;}
}

@-o-keyframes myfirst /* Opera */
{
0%   {background: red;}
25%  {background: yellow;}
50%  {background: blue;}
100% {background: green;}
}

简写的动画 animation 属性:

div
{
animation: myfirst 5s linear 2s infinite alternate;
/* Firefox: */
-moz-animation: myfirst 5s linear 2s infinite alternate;
/* Safari 和 Chrome: */
-webkit-animation: myfirst 5s linear 2s infinite alternate;
/* Opera: */
-o-animation: myfirst 5s linear 2s infinite alternate;
}
原文地址:https://www.cnblogs.com/xulei1992/p/6438854.html