标签：加速 body 2.7 har int getc llb attrs last
鼠标点击后，所有div掉下来
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
div{
position: absolute;
transform: rotateZ(360deg);
}
</style>
</head>
<body>
</body>
<!--<script src="move.js"></script>-->
<script type="text/javascript">
var div = document.getElementsByTagName("div");
var len = 20;
var num = 0;
var timer = null;
var str = ‘‘;
for (var i = 0; i < len; i++) {
str +=‘<div style="width:50px;height:50px;background:purple;position:absolute;left:‘+i*60+‘px;top:10px"></div>‘
}
document.body.innerHTML = str;
document.onclick = function(){
timer = setInterval(function(){
move(div[num],{top:200},500,‘linear‘)
num++;
if(num>=len){
clearInterval(timer);
num=0;
}
},200)
};
////////////////////下面不用看，是调用的框架///////////////////
/*
* 调用：
*
* move(obj, {left:10,top:20,opacity:0.8}, duration, fx, callback)
*
* 第二个参数里用键值对的形式，值没有单位，opacity的值为0-1
*
*/
function move(obj, attrs, duration, fx, callback) {
clearInterval(obj.timer);
var startTime = new Date().getTime();
var j = {};
for (var attr in attrs) {
j[attr] = {}
j[attr].b = parseFloat(getComputedStyle(obj)[attr]);
j[attr].c = attrs[attr] - j[attr].b;
}
var d = duration;
obj.timer = setInterval(function() {
var t = new Date().getTime() - startTime;
if ( t >= d ) {
t = d;
}
for (var attr in attrs) {
var b = j[attr].b;
var c = j[attr].c;
var value = Tween[fx](t, b, c, d);
if ( attr == ‘opacity‘ ) {
obj.style[attr] = value;
} else {
obj.style[attr] = value + ‘px‘;
}
}
if ( t == d ) {
clearInterval(obj.timer);
if (typeof callback == ‘function‘) {
callback.call(obj);
}
}
}, 16);
}
/*
* t : time 已过时间
* b : begin 起始值
* c : count 总的运动值
* d : duration 持续时间
* */
//Tween.linear();
var Tween = {
linear: function (t, b, c, d){ //匀速
return c*t/d + b;
},
easeIn: function(t, b, c, d){ //加速曲线
return c*(t/=d)*t + b;
},
easeOut: function(t, b, c, d){ //减速曲线
return -c *(t/=d)*(t-2) + b;
},
easeBoth: function(t, b, c, d){ //加速减速曲线
if ((t/=d/2) < 1) {
return c/2*t*t + b;
}
return -c/2 * ((--t)*(t-2) - 1) + b;
},
easeInStrong: function(t, b, c, d){ //加加速曲线
return c*(t/=d)*t*t*t + b;
},
easeOutStrong: function(t, b, c, d){ //减减速曲线
return -c * ((t=t/d-1)*t*t*t - 1) + b;
},
easeBothStrong: function(t, b, c, d){ //加加速减减速曲线
if ((t/=d/2) < 1) {
return c/2*t*t*t*t + b;
}
return -c/2 * ((t-=2)*t*t*t - 2) + b;
},
elasticIn: function(t, b, c, d, a, p){ //正弦衰减曲线（弹动渐入）
if (t === 0) {
return b;
}
if ( (t /= d) == 1 ) {
return b+c;
}
if (!p) {
p=d*0.3;
}
if (!a || a < Math.abs(c)) {
a = c;
var s = p/4;
} else {
var s = p/(2*Math.PI) * Math.asin (c/a);
}
return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
},
elasticOut: function(t, b, c, d, a, p){ //正弦增强曲线（弹动渐出）
if (t === 0) {
return b;
}
if ( (t /= d) == 1 ) {
return b+c;
}
if (!p) {
p=d*0.3;
}
if (!a || a < Math.abs(c)) {
a = c;
var s = p / 4;
} else {
var s = p/(2*Math.PI) * Math.asin (c/a);
}
return a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b;
},
elasticBoth: function(t, b, c, d, a, p){
if (t === 0) {
return b;
}
if ( (t /= d/2) == 2 ) {
return b+c;
}
if (!p) {
p = d*(0.3*1.5);
}
if ( !a || a < Math.abs(c) ) {
a = c;
var s = p/4;
}
else {
var s = p/(2*Math.PI) * Math.asin (c/a);
}
if (t < 1) {
return - 0.5*(a*Math.pow(2,10*(t-=1)) *
Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
}
return a*Math.pow(2,-10*(t-=1)) *
Math.sin( (t*d-s)*(2*Math.PI)/p )*0.5 + c + b;
},
backIn: function(t, b, c, d, s){ //回退加速（回退渐入）
if (typeof s == ‘undefined‘) {
s = 1.70158;
}
return c*(t/=d)*t*((s+1)*t - s) + b;
},
backOut: function(t, b, c, d, s){
if (typeof s == ‘undefined‘) {
s = 3.70158; //回缩的距离
}
return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
},
backBoth: function(t, b, c, d, s){
if (typeof s == ‘undefined‘) {
s = 1.70158;
}
if ((t /= d/2 ) < 1) {
return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
}
return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
},
bounceIn: function(t, b, c, d){ //弹球减振（弹球渐出）
return c - Tween[‘bounceOut‘](d-t, 0, c, d) + b;
},
bounceOut: function(t, b, c, d){
if ((t/=d) < (1/2.75)) {
return c*(7.5625*t*t) + b;
} else if (t < (2/2.75)) {
return c*(7.5625*(t-=(1.5/2.75))*t + 0.75) + b;
} else if (t < (2.5/2.75)) {
return c*(7.5625*(t-=(2.25/2.75))*t + 0.9375) + b;
}
return c*(7.5625*(t-=(2.625/2.75))*t + 0.984375) + b;
},
bounceBoth: function(t, b, c, d){
if (t < d/2) {
return Tween[‘bounceIn‘](t*2, 0, c, d) * 0.5 + b;
}
return Tween[‘bounceOut‘](t*2-d, 0, c, d) * 0.5 + c*0.5 + b;
}
}
////
</script>
</html>
海量前端学习练习资料库，加web前端学习部落22群下载~~~
标签：加速 body 2.7 har int getc llb attrs last
原文地址：http://www.cnblogs.com/ZZZAB/p/6261651.html
