使用css3 animation动画
‘use strict‘;
var mousex, mousey;
function tuo(el) {
var move = function () {
el.style.left = event.x - mousex + ‘px‘;
el.style.top = event.y - mousey + ‘px‘;
};
el.addEventListener(‘mousedown‘, function () {
mousex = event.x - el.offsetLeft;
mousey = event.y - el.offsetTop;
document.addEventListener(‘mousemove‘, move);
});
el.addEventListener(‘mouseup‘, function () {
document.removeEventListener("mousemove", move, false);
});
};
tuo(document.getElementById(‘box‘));
tuo(document.getElementById(‘gradual‘));
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>js</title>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
#box{
width:400px;
height:290px;
position: absolute;
left: 100px;
top: 50px;
overflow: hidden;
box-shadow:0 0 30px rgba(0,0,0,1);
background-size: cover;
background-position: center;
-webkit-animation-name: "loops";
-webkit-animation-duration: 10s;
-webkit-animation-iteration-count: infinite;
-webkit-animation-timing-function: linera;/*线性变化*/
}
@-webkit-keyframes "loops" {
0% {
background:url(http://d.hiphotos.baidu.com/image/w%3D400/sign=c01e6adca964034f0fcdc3069fc27980/e824b899a9014c08e5e38ca4087b02087af4f4d3.jpg) no-repeat;
}
25% {
background:url(http://b.hiphotos.baidu.com/image/w%3D400/sign=edee1572e9f81a4c2632edc9e72b6029/30adcbef76094b364d72bceba1cc7cd98c109dd0.jpg) no-repeat;
}
50% {
background:url(http://b.hiphotos.baidu.com/image/w%3D400/sign=937dace2552c11dfded1be2353266255/d8f9d72a6059252d258e7605369b033b5bb5b912.jpg) no-repeat;
}
75% {
background:url(http://g.hiphotos.baidu.com/image/w%3D400/sign=7d37500b8544ebf86d71653fe9f9d736/0df431adcbef76095d61f0972cdda3cc7cd99e4b.jpg) no-repeat;
}
100% {
background:url(http://c.hiphotos.baidu.com/image/w%3D400/sign=cfb239ceb0fb43161a1f7b7a10a54642/3b87e950352ac65ce2e73f76f9f2b21192138ad1.jpg) no-repeat;
}
}
.gradual {
width: 200px;
height: 200px;
position: absolute;
left: 600px;
top: 50px;
-webkit-animation-name: gradual;
-webkit-animation-duration: 10s;
-webkit-animation-iteration-count: infinite; /*无线循环动画*/
-webkit-animation-timing-function: steps(4, start);/*帧数变化*/
/*steps的设置都是针对两个关键帧之间的*/
}
@-webkit-keyframes gradual {
0% { background: red;}
25% { background: yellow;}
50% { background: blue;}
100% { background: black;}
}
</style>
</head>
<body>
<div id="box"></div>
<div class="gradual" id="gradual"></div>
</body>
</html>
时间： 2024-10-15 09:38:14