首页 技术 正文
技术 2022年11月10日
0 收藏 861 点赞 3,503 浏览 17977 个字

一、JavaScript运动框架之速度版


1.1 运动框架的实现思路


运动,其实就是在一段时间内改变 left 、 right 、 width 、 height 、 opactiy 的值,到达目的地之后停止

  • 位移 top,left
  • 折叠 width,height
  • 淡入淡出 opacity
  • 时间有关系
    • setInterval
    • setTimeout
  • 用javascript直接获取行间样式很容易,但如果要获取非行间样式那我们只能借助函数了。我这里编写了一个名为getStyle的函数,专门处理取非行间的样式
123 function getStyle(obj,attr){return getComputedStyle(obj)[attr]?getComputedStyle(obj)[attr]:obj.currentStyle[attr];}

1.2 一些案例演示


1.2.1 运动之速

1 <div id=”box”></div>
1234567 #box {width: 100px;height: 100px;background: red;position: relative;left: 0;}
123456789101112131415161718192021222324252627 var box = document.getElementById(“box”);var speed = 0; //步长var target = 600;var timer = null;timer = setInterval(function(){var curr = parseInt(getStyle(box,”left”)); //去除getStyle(box,”left”)的单位if(curr == target){clearInterval(timer);speed = 0;alert(“运动结束”);}else{speed +=10;box.style.left = speed + “px”;}  },1000/30); //监控left的值的变化 怎么样拿到left的值//alert(getComputedStyle(box)[“width”]);//alert(box.currentStyle[“left”]);// currentStyle –IE // getComputedStyle — 非IE function getStyle(obj,attr){return getComputedStyle(obj)[attr]?getComputedStyle(obj)[attr]:obj.currentStyle[attr];}

在线演示

1.2.2 运动速度之封装1

1 <div id=”ball”></div>
12345 #ball {width: 100px;height: 100px;background: blue;}
1234567891011121314151617181920212223242526272829303132333435 var ball = document.getElementById(“ball”); ball.onmouseover = function(){//同时变换 用的最多//move(this,”width”,500,10);//move(this,”height”,500,10);move(ball,{“width”:400,”height”:300},10);}ball.onmouseout = function(){//move(this,”width”,100,-10);//move(this,”height”,100,-10);move(ball,{“width”:100,”height”:100},-10);}function move(obj,json,speed){clearInterval(obj.timer);var mark = true;obj.timer = setInterval(function(){for(var attr in json){var curr = parseInt(getStyle(obj,attr));var target = json[attr];if(curr != target){obj.style[attr] = curr+speed+”px”;mark = false;}}if(mark){clearInterval(obj.timer);}},1000/30);}  function getStyle(obj,attr){return getComputedStyle(obj)[attr]?getComputedStyle(obj)[attr]:obj.currentStyle[attr];}
  • 需要注意的地方

    • 当需要两个动画的时候,会执行后面一个,解决办法如下,回调函数
    • 当需要两个以上的时候,需要考虑是否可写一行代码变换多个属性
    • 变换不一致的时候,定时器被提前清除

在线演示

1.2.3 运动速度之封装2–增加opacity
1 <div id=”ball”></div>
123456789 #ball {position: relative;left: 0;top: 0;width: 100px;height: 100px;background: blue;opacity: 1;}
12345678910111213141516171819202122232425262728293031323334353637383940414243 var ball = document.getElementById(“ball”);ball.onmouseover = function(){move(ball,{“width”:300,”height”:300,”opacity”:0.3});}// ball.onmouseout = function(){// move(ball,{“width”:100,”height”:100},-10);// }function move(obj,json){clearInterval(obj.timer);var mark = true;obj.timer = setInterval(function(){for(var attr in json){var curr = null;var target = json[attr];var speed = null;if(attr == “opacity”){curr = getStyle(obj,attr)*100;speed = (target*100-curr)*0.15;}else {curr = parseInt(getStyle(obj,attr));speed = (target – curr)*0.15;}speed = speed>0 ? Math.ceil(speed):Math.floor(speed);if(curr != target){if(attr == “opacity”){obj.style[attr] = (curr+speed)/100;}else {obj.style[attr] = curr+speed+”px”;} mark = false;}}if(mark){clearInterval(obj.timer);}},1000/30);}  function getStyle(obj,attr){return getComputedStyle(obj)[attr]?getComputedStyle(obj)[attr]:obj.currentStyle[attr];}

在线演示

  • 需要注意的地方

    • 当需要两个动画的时候,会执行后面一个,解决办法如下,回调函数
    • 当需要两个以上的时候,需要考虑是否可写一行代码变换多个属性
    • 变换不一致的时候,定时器被提前清除
    • 速度speed不要写死

1.3 运动框架之应用

1.3.1 分享按钮
1234 <div id=”ball”></div><div id=”box1″><div id=”box2″>分享到</div></div>
12345678910111213141516171819202122232425262728293031323334353637383940414243444546 var box1 = document.getElementById(“box1”);var ball = document.getElementById(“ball”); box1.onmouseover = function(){move(this,”left”,0,10);}box1.onmouseout = function(){move(this,”left”,-100,-10);}//问题一:当需要两个动画的时候,会执行后面一个,解决办法如下,回调函数ball.onmouseover = function(){//同时变换 用的最多//move(this,”width”,500,10);//move(this,”height”,500,10);//列队在执行move(ball,”width”,500,10,function(){move(ball,”height”,500,10);});}ball.onmouseout = function(){//move(this,”width”,100,-10);//move(this,”height”,100,-10);move(ball,”width”,100,-10,function(){move(ball,”height”,100,-10);});}var timer = null;function move(obj,attr,target,speed,callback){clearInterval(timer); //obj.timer缓存到各自的obj下timer = setInterval(function(){var curr = parseInt(getStyle(obj,attr));if(curr == target){clearInterval(timer);callback && callback();}else {obj.style[attr] = curr+speed+”px”;}},1000/30);}    function getStyle(obj,attr){return getComputedStyle(obj)[attr]?getComputedStyle(obj)[attr]:obj.currentStyle[attr];}

在线演示

1.3.2运动框架之轮播图应用
1.3.2.1 焦点轮播–左右-无缝-速度版实现

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162 <div id=”box”><ul id=”imgBox”><li>![](//upload-images.jianshu.io/upload_images/1480597-c72819402fb928e8.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)</li><li>![](//upload-images.jianshu.io/upload_images/1480597-6830ca74fe1e6fcd.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)</li><li>![](//upload-images.jianshu.io/upload_images/1480597-5d38376e63ffd0b0.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)</li><li>![](//upload-images.jianshu.io/upload_images/1480597-2aa932ffbba4091e.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)</li><li>![](//upload-images.jianshu.io/upload_images/1480597-c72819402fb928e8.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)</li></ul><ol id=”btn”><li class=”active”>1</li><li>2</li><li>3</li><li>4</li></ol></div><script src=”http://7xq6al.com1.z0.glb.clouddn.com/Animate.min.js”></script><script type=”text/javascript”>var box = document.querySelector(“#box”);var imgUl = document.querySelector(“#imgBox”);var btns = document.querySelector(“#btn”).querySelectorAll(“li”);var len = btns.length;var lenImg = imgUl.querySelectorAll(“li”).length;var index = 0; //控制img的索引var cindex = 0;//控制按钮的索引var timer = null; for (var i=0;i<len;i++) {(function(index){btns[index].onmouseover = function(){for (var j=0;j<len;j++){btns[j].className = “”;}cindex = index;//保持索引同步animateSpeed(imgUl,{“left”:-970*index});this.className = “active”;}})(i);}function autoPlay(){index++;cindex++;cindex %=len;//限制长度for (var j=0;j<len;j++){btns[j].className = “”;}animateSpeed(imgUl,{“left”:-970*index},function(){ if(index == lenImg-1){this.style.left = 0;index = 0;}});btns[cindex].className = “active”;}timer = setInterval(autoPlay,2000);box.onmouseover = function(){clearInterval(timer);}box.onmouseout = function(){timer = setInterval(autoPlay,2000);}</script>
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354 *{padding: 0;margin: 0;}body{font-size: 14px;font-family: “微软雅黑”;}ul,li{list-style: none;}#box {position: relative;width: 970px;height: 350px;margin: 30px auto;overflow: hidden;}#imgBox {width:1000%;/*自动计算百分比*/position: absolute;left: 0;}#imgBox li{width: 970px;height: 350px;float: left;} #imgBox li img {width: 970px;height: 350px;}#btn {width: 120px;position: absolute;right: 10px;bottom: 10px;}#btn li {width: 20px;height: 20px;line-height: 20px;border-radius: 50%;text-align: center;cursor: pointer;background: #fff;margin: 0 2px;float: left;}#btn li.active {background: #F17A5C;color: #fff;}
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647  //速度版本(function(win){function move(obj,json,callback){clearInterval(obj.timer);obj.timer = setInterval(function(){var mark = true;for(var attr in json){var cur = null;if(attr == “opacity”){cur = getStyle(obj,attr)*100;}else{//如果没写 默认填充成0cur = parseInt(getStyle(obj,attr))||0;}var target = json[attr];var speed = (target – cur)*0.2;speed = speed>0?Math.ceil(speed):Math.floor(speed);if(cur != target){if(attr == “opacity”){//IE opacity兼容问题obj.style.filter = “alpha(opacity=”+(cur+speed)+”)”;obj.style[attr] = (cur + speed)/100;}else{obj.style[attr] = cur + speed + “px”;}mark = false; };}if(mark){clearInterval(obj.timer);callback && callback.call(obj);}},1000/30);}win.animateSpeed = move;})(window);  function getStyle(obj,attr){return getComputedStyle(obj)[attr]?getComputedStyle(obj)[attr]:obj.currentStyle[attr];} function getId(id){return document.getElementById(id);}

二、JavaScript运动框架之时间版


2.1 关于运动


  • 速度的运动 通过速度来控制元素的 位移 / 折叠 / 淡入淡出
  • 时间的运动 通过时间来控制元素的 位移 / 折叠 / 淡入淡出(jQuery)
  • 时间的运动 基于一些数学公式 匀速运动 在路程的每一个点 速度都一样
2.2 一些案例演示

2.3 运动框架之时间版本-借助animate一些函数实现–综合完整版


12345678910111213141516171819202122232425262728293031323334353637383940414243 <div id=”box2″></div><div id=”box3″></div><div id=”box4″></div><div id=”box5″></div><script type=”text/javascript”> //时间版本getId(“box2”).onclick = function(){animateTime(getId(“box2”),{“left”:500,”opacity”:100},1000,”elasticOut”,function(){this.innerHTML = “我是时间版本”;});}getId(“box3”).onclick = function(){animateTime(getId(“box3”),{“left”:500,”opacity”:100},1000,”backIn”,function(){this.innerHTML = “我是时间版本”;});}getId(“box4”).onclick = function(){animateTime(getId(“box4”),{“left”:500,”opacity”:100},1000,”bounceIn”,function(){this.innerHTML = “我是时间版本”;});}getId(“box5”).onclick = function(){animateTime(getId(“box5”),{“left”:500,”opacity”:100},1000,”bounceBoth”,function(){this.innerHTML = “我是时间版本”;});}   </script>
1234567891011121314 #box1,#box2,#box3,#box4,#box5 {position: relative;width: 100px;height: 100px;line-height: 100px;text-align: center;background: red;color: #fff;font-size: 12px;opacity: 0.5;filter:alpha(opcity=20);/**兼容IE*/margin: 10px; }
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200  /*t b c dt current time :nTime-sTimeb begining time :currc chang in value :变化量end-currd duration :持续时间 time *//**** @param {Object} obj 元素对象* @param {Object} json 多个属性* @param {Object} time 变化时间* @param {Object} prop 运动函数* @param {Object} callback 回调函数*///时间版本(function(win){ function move(obj,json,time,prop,callback){//一般定时器结束后最好清除clearInterval(obj.timer);var curr = {};var end = {};//通过for in 在上车前把所有东西装到包里for(var attr in json){if(attr == “opacity”){//opacity特殊东西特殊对待curr[attr] = getStyle(obj,attr)*100;//化为整数好计算}else{curr[attr] = parseInt(getStyle(obj,attr))||0;}end[attr] = json[attr]; }  //如果没写默认值 默认就是0 不然在IE出问题//var curr = parseInt(getStyle(obj,attr))||0;//var end = target;var sTime = new Date();//开始时间T0//开始变换了obj.timer = setInterval(function(){var nTime = new Date();//当前时间Ttvar t = nTime -sTime;var d = time;//St = (Tt-T0)/Time*(S-S0)+S0//(nTime-sTime)/time 比例最多为1/*var prop = (nTime-sTime)/time; */if(t >=d){t = d;clearInterval(obj.timer);callback && callback.call(obj);}for(var attr in json){var b = curr[attr];var c = end[attr] – b;if(attr == “opacity”){//var s = prop*(end[attr]-curr[attr])+curr[attr];var s = Tween[prop](t,b,c,d);obj.style[attr] = s/100;obj.style.filter = “alpha(opacity=”+s+”)”;}else{//var s = prop*(end[attr]-curr[attr])+curr[attr];var s = Tween[prop](t,b,c,d);obj.style[attr] = s+”px”;} }  },13);var Tween = {linear: function (t, b, c, d){ //匀速return c*t/d + b; // t/d = prop;},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;}};}win.animateTime = move;})(window);

在线演示

三、运动框架之时间速度版完整封装

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247 /*t b c dt current time :nTime-sTimeb begining time :currc chang in value :变化量end-currd duration :持续时间 time *//**** @param {Object} obj 元素对象* @param {Object} json 多个属性* @param {Object} time 变化时间* @param {Object} prop 运动函数* @param {Object} callback 回调函数*///时间版本(function(win){ function move(obj,json,time,prop,callback){//一般定时器结束后最好清除clearInterval(obj.timer);var curr = {};var end = {};//通过for in 在上车前把所有东西装到包里for(var attr in json){if(attr == “opacity”){//opacity特殊东西特殊对待curr[attr] = getStyle(obj,attr)*100;//化为整数好计算}else{curr[attr] = parseInt(getStyle(obj,attr))||0;}end[attr] = json[attr]; }  //如果没写默认值 默认就是0 不然在IE出问题//var curr = parseInt(getStyle(obj,attr))||0;//var end = target;var sTime = new Date();//开始时间T0//开始变换了obj.timer = setInterval(function(){var nTime = new Date();//当前时间Ttvar t = nTime -sTime;var d = time;//St = (Tt-T0)/Time*(S-S0)+S0//(nTime-sTime)/time 比例最多为1/*var prop = (nTime-sTime)/time; */if(t >=d){t = d;clearInterval(obj.timer);callback && callback.call(obj);}for(var attr in json){var b = curr[attr];var c = end[attr] – b;if(attr == “opacity”){//var s = prop*(end[attr]-curr[attr])+curr[attr];var s = Tween[prop](t,b,c,d);obj.style[attr] = s/100;obj.style.filter = “alpha(opacity=”+s+”)”;}else{//var s = prop*(end[attr]-curr[attr])+curr[attr];var s = Tween[prop](t,b,c,d);obj.style[attr] = s+”px”;} }  },13);var Tween = {linear: function (t, b, c, d){ //匀速return c*t/d + b; // t/d = prop;},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;}};}win.animateTime = move;})(window);  //速度版本(function(win){function move(obj,json,callback){clearInterval(obj.timer);obj.timer = setInterval(function(){var mark = true;for(var attr in json){var cur = null;if(attr == “opacity”){cur = getStyle(obj,attr)*100;}else{//如果没写 默认填充成0cur = parseInt(getStyle(obj,attr))||0;}var target = json[attr];var speed = (target – cur)*0.2;speed = speed>0?Math.ceil(speed):Math.floor(speed);if(cur != target){if(attr == “opacity”){//IE opacity兼容问题obj.style.filter = “alpha(opacity=”+(cur+speed)+”)”;obj.style[attr] = (cur + speed)/100;}else{obj.style[attr] = cur + speed + “px”;}mark = false; };}if(mark){clearInterval(obj.timer);callback && callback.call(obj);}},1000/30);}win.animateSpeed = move;})(window);  function getStyle(obj,attr){return getComputedStyle(obj)[attr]?getComputedStyle(obj)[attr]:obj.currentStyle[attr];} function getId(id){return document.getElementById(id);}

from:http://blog.poetries.top/2017/01/12/js-animate/?utm_source=tuicool&utm_medium=referral

相关推荐
python开发_常用的python模块及安装方法
adodb:我们领导推荐的数据库连接组件bsddb3:BerkeleyDB的连接组件Cheetah-1.0:我比较喜欢这个版本的cheeta…
日期:2022-11-24 点赞:878 阅读:9,088
Educational Codeforces Round 11 C. Hard Process 二分
C. Hard Process题目连接:http://www.codeforces.com/contest/660/problem/CDes…
日期:2022-11-24 点赞:807 阅读:5,564
下载Ubuntn 17.04 内核源代码
zengkefu@server1:/usr/src$ uname -aLinux server1 4.10.0-19-generic #21…
日期:2022-11-24 点赞:569 阅读:6,413
可用Active Desktop Calendar V7.86 注册码序列号
可用Active Desktop Calendar V7.86 注册码序列号Name: www.greendown.cn Code: &nb…
日期:2022-11-24 点赞:733 阅读:6,186
Android调用系统相机、自定义相机、处理大图片
Android调用系统相机和自定义相机实例本博文主要是介绍了android上使用相机进行拍照并显示的两种方式,并且由于涉及到要把拍到的照片显…
日期:2022-11-24 点赞:512 阅读:7,822
Struts的使用
一、Struts2的获取  Struts的官方网站为:http://struts.apache.org/  下载完Struts2的jar包,…
日期:2022-11-24 点赞:671 阅读:4,905