zoukankan html css js c++ java

每天一个JS 小demo之韩雪冬轮播图。主要知识点：html，css布局，对于数组和对象的理解和运用

 1 @charset "utf-8";
 2 /* CSS Document */
 3 
 4 * { padding: 0; margin: 0; }
 5 li { list-style: none; }
 6 img { border: none; }
 7 body { background: #ececec; padding-top: 50px; }
 8 
 9 #automatic { width: 970px; height: 344px; position: relative; margin: 0 auto; overflow: hidden; }
10 
11 .prev_div { width: 130px; height: 72px; position: absolute; top: 128px; left: 92px; z-index: 5; background: red; filter: alpha(opacity=0); opacity: 0; cursor: pointer; }
12 .next_div { width: 130px; height: 72px; position: absolute; top: 128px; right: 92px; z-index: 5; background: red; filter: alpha(opacity=0); opacity: 0; cursor: pointer; }
13 
14 #automatic .prev { width: 120px; height: 72px; position: absolute; top: 108px; left: 72px; z-index: 4; }
15 #automatic .prev .ico { width: 76px; height: 112px; position: absolute; top: 0; left: 0; background: url(images/prev.png); }
16 #automatic .prev .ico1 { width: 76px; height: 112px; position: absolute; top: 0; left: 0; background: url(images/prev_1.png); z-index: 2; filter: alpha(opacity=0); opacity: 0; }
17 #automatic .prev .txt { width: 106px; height: 112px; position: absolute; top: 0; left: 65px; background: url(images/prev_txt.png) no-repeat; filter: alpha(opacity=0); opacity: 0; }
18 
19 #automatic .next { width: 120px; height: 72px; position: absolute; top: 108px; right: 72px; z-index: 4; }
20 #automatic .next .ico { width: 76px; height: 112px; position: absolute; top: 0; right: 0; background: url(images/next.png) no-repeat; }
21 #automatic .next .ico1 { width: 76px; height: 112px; position: absolute; top: 0; right: 0px; background: url(images/next_1.png) no-repeat; z-index: 2; filter: alpha(opacity=0); opacity: 0; }
22 #automatic .next .txt { width: 106px; height: 112px; position: absolute; top: 0; right: 65px; background: url(images/next_txt.png) no-repeat; filter: alpha(opacity=0); opacity: 0; }
23 
24 #automatic ul { width: 970px; height: 344px; position: absolute; top: 0; left: 0; z-index: 1; }
25 #automatic li { position: absolute; }
26 
27 #automatic .line { border: 4px solid #fff; width: 672px; height: 336px; position: absolute; top: 0; left: 50%; margin-left: -340px; z-index: 3; }
28 
29 #automatic .pos_0 { top: -104px; left: 0; z-index: 1; filter: alpha(opacity=0); opacity: 0; }
30 #automatic .pos_1 { top: 104px; left: 0; z-index: 2; filter: alpha(opacity=60); opacity: 0.6; }
31 #automatic .pos_2 { top: 43px; left: 50px; z-index: 3; filter: alpha(opacity=80); opacity: 0.8; }
32 #automatic .pos_3 { top: 0; left: 145px; z-index: 4; }
33 #automatic .pos_4 { top: 43px; right: 50px; z-index: 3; filter: alpha(opacity=80); opacity: 0.8; }
34 #automatic .pos_5 { top: 104px; right: 0; z-index: 2; filter: alpha(opacity=60); opacity: 0.6; }
35 #automatic .pos_6 { top: -104px; right: 0; z-index: 1; filter: alpha(opacity=0); opacity: 0; }
36 
37 #footer { width: 970px; height: 30px; text-align: center; padding-top: 50px; margin: 0 auto; }
38 #footer a { color: #930; font-family: arial; font-size: 15px; text-decoration: none; border-bottom: 1px dotted #930; }
39 #footer a:hover { border-bottom: 1px solid #930; }

  1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  2 <html xmlns="http://www.w3.org/1999/xhtml">
  3 <head>
  4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  5 <title>韩雪冬网站效果 - 妙味课堂 - www.miaov.com</title>
  6 <!--[if lte IE 6]>
  7 <script src="js/DD_belatedPNG_0.0.8a.js" type="text/javascript"></script>
  8     <script type="text/javascript">
  9         DD_belatedPNG.fix('span');
 10     </script>
 11 <![endif]-->
 12 <link href="style.css" rel="stylesheet" type="text/css" />
 13 </head>
 14 
 15 <body>
 16 
 17 <div id="automatic">
 18 
 19     <div class="prev_div"></div>
 20     <a class="prev" href="###">
 21         <span class="ico1"></span>
 22         <span class="ico"></span>
 23         <span class="txt"></span>
 24     </a>
 25     
 26     <div class="next_div"></div>
 27     <a class="next" href="###">
 28         <span class="ico1"></span>
 29         <span class="ico"></span>
 30         <span class="txt"></span>
 31     </a>
 32 
 33     <div class="line"></div>
 34 
 35     <ul class="picList">
 36         <li class="pos_0"><a href="http://www.miaov.com"><img src="images/8.jpg" width="100" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
 37         <li class="pos_1"><a href="http://www.miaov.com"><img src="images/1.jpg" width="270" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
 38         <li class="pos_2"><a href="http://www.miaov.com"><img src="images/2.jpg" width="510" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
 39         <li class="pos_3"><a href="http://www.miaov.com"><img src="images/3.jpg" width="680" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
 40         <li class="pos_4"><a href="http://www.miaov.com"><img src="images/4.jpg" width="510" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
 41         <li class="pos_5"><a href="http://www.miaov.com"><img src="images/5.jpg" width="270" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
 42         <li class="pos_6"><a href="http://www.miaov.com"><img src="images/6.jpg" width="270" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
 43         <li class="pos_6"><a href="http://www.miaov.com"><img src="images/7.jpg" width="270" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
 44     </ul>
 45 </div>
 46 <p id="footer"><a href="http://www.miaov.com">妙味课堂 - www.miaov.com</a></p>
 47 </body>
 48 </html>
 49 <script type="text/javascript" src="../../startmove.js"></script>
 50 <script type="text/javascript">
 51 /*初始宽度*/
 52 // 使用函数自执行写法，防止全局污染
 53 (function(){
 54      var picList = document.querySelectorAll('.picList>li');
 55     for(var i = 0; i <picList.length;i++){
 56         // 为什么要加个[0]？
 57         var img = picList[i].getElementsByTagName("img")[0];
 58         css(picList[i],"width",img.width);
 59         img.style.width = "100%";
 60     }
 61 })();
 62 /* 左侧按钮的鼠标移入移出动画 */
 63 (function(){
 64     // 由于prev内部的元素层级都比它自身高，盖在它上面，所以如果在prev上加onmouseover或者onmouseout,实际上鼠标根本移动不到prev上，所以添加一个层级较高的prevBtn来防止干扰，nextBtn同理
 65     var prevBtn = document.querySelector('.prev_div');
 66     var prev = document.querySelector('.prev');
 67     var prevSpan = prev.querySelectorAll('span');
 68     prevBtn.onmouseover = function(){
 69          startMove({
 70             el: prevSpan[1],
 71             target: {
 72                 left: 12
 73             },
 74             time: 300,
 75             type: "easeBoth"
 76         });
 77         startMove({
 78             el: prevSpan[0],
 79             target: {
 80                 opacity:1,
 81                 left: 12
 82             },
 83             time: 300,
 84             type: "easeBoth"
 85         });
 86         startMove({
 87             el: prevSpan[2],
 88             target: {
 89                 opacity:1,
 90                 left: 53
 91             },
 92             time: 300,
 93             type: "easeBoth"
 94         });
 95     };
 96     prevBtn.onmouseout = function(){
 97          startMove({
 98             el: prevSpan[1],
 99             target: {
100                 left: 0
101             },
102             time: 300,
103             type: "easeBoth"
104         });
105         startMove({
106             el: prevSpan[0],
107             target: {
108                 opacity:0,
109                 left: 0
110             },
111             time: 300,
112             type: "easeBoth"
113         });
114         startMove({
115             el: prevSpan[2],
116             target: {
117                 opacity:0,
118                 left: 65
119             },
120             time: 300,
121             type: "easeBoth"
122         });
123     };
124 })();
125 /* 右侧按钮的鼠标移入移出动画 */
126 (function(){
127     var nextBtn = document.querySelector('.next_div');
128     var next = document.querySelector('.next');
129     var nextSpan = next.querySelectorAll('span');
130     nextBtn.onmouseover = function(){
131          startMove({
132             el: nextSpan[1],
133             target: {
134                 right: 12
135             },
136             time: 300,
137             type: "easeBoth"
138         });
139         startMove({
140             el: nextSpan[0],
141             target: {
142                 opacity:1,
143                 right: 12
144             },
145             time: 300,
146             type: "easeBoth"
147         });
148         startMove({
149             el: nextSpan[2],
150             target: {
151                 opacity:1,
152                 right: 53
153             },
154             time: 300,
155             type: "easeBoth"
156         });
157     };
158     nextBtn.onmouseout = function(){
159          startMove({
160             el: nextSpan[1],
161             target: {
162                 right: 0
163             },
164             time: 300,
165             type: "easeBoth"
166         });
167         startMove({
168             el: nextSpan[0],
169             target: {
170                 opacity:0,
171                 right: 0
172             },
173             time: 300,
174             type: "easeBoth"
175         });
176         startMove({
177             el: nextSpan[2],
178             target: {
179                 opacity:0,
180                 right: 65
181             },
182             time: 300,
183             type: "easeBoth"
184         });
185     };
186 })();
187 /*
188     点击切换动画
189 */
190 (function(){
191     var wrap = document.querySelector('#automatic');
192     var prevBtn = document.querySelector('.prev_div');
193     var nextBtn = document.querySelector('.next_div');
194     var picList = document.querySelectorAll('.picList>li');
195     var line = document.querySelector('.line');
196     var attrs = [];
197     var timer = 0;
198     for(var i = 0; i <picList.length; i++){
199         // 先给li在数组中对应的空间内添加一个对象，用于存储它的各项属性数据
200         attrs[i] = {};
201         attrs[i].width = css(picList[i],"width");
202         attrs[i].left = css(picList[i],"left");
203         attrs[i].top = css(picList[i],"top");
204         attrs[i].opacity = css(picList[i],"opacity");
205         attrs[i].zIndex = css(picList[i],"zIndex");
206     }
207     prevBtn.onclick = function(){
208         attrs.push(attrs.shift());
209         setStyle();
210     };
211     nextBtn.onclick = function(){
212         attrs.unshift(attrs.pop());
213         setStyle();
214     };
215     function setStyle(){
216         css(line,"opacity",0);
217         for(var i = 0; i <picList.length; i++){
218             // css(picList[i],"left",attrs[i].left);
219             // css(picList[i],"top",attrs[i].top);
220             // css(picList[i],"opacity",attrs[i].opacity);
221             // css(picList[i],"zIndex",attrs[i].zIndex);
222             // 让图片提前显示出来再变化样式
223             css(picList[i],"zIndex",attrs[i].zIndex);
224             startMove({
225                 el: picList[i],
226                 target: attrs[i],
227                 time: 500,
228                 type: "easeOut",
229                 callBack: function(){
230                     startMove({
231                         el:line,
232                         target:{opacity:1},
233                         time: 200,
234                         type: "easeOut",
235                         callBack:function(){
236                             console.log(1);
237                         }
238                     });
239                 }
240             });
241         }
242     }
243     timer = setInterval(function(){
244         nextBtn.onclick();
245     },3000);
246     wrap.onmouseover = function(){
247         clearInterval(timer);
248     }
249     wrap.onmouseout = function(){
250         timer = setInterval(function(){
251             nextBtn.onclick();
252         },3000);
253     }
254 })();
255 </script>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>韩雪冬网站效果 - 妙味课堂 - www.miaov.com</title>

<link href="style.css" rel="stylesheet" type="text/css" />
</head>

<body>

<ul class="picList">
<li class="pos_0"><a href="http://www.miaov.com"><img src="images/8.jpg" width="100" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
<li class="pos_1"><a href="http://www.miaov.com"><img src="images/1.jpg" width="270" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
<li class="pos_2"><a href="http://www.miaov.com"><img src="images/2.jpg" width="510" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
<li class="pos_3"><a href="http://www.miaov.com"><img src="images/3.jpg" width="680" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
<li class="pos_4"><a href="http://www.miaov.com"><img src="images/4.jpg" width="510" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
<li class="pos_5"><a href="http://www.miaov.com"><img src="images/5.jpg" width="270" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
<li class="pos_6"><a href="http://www.miaov.com"><img src="images/6.jpg" width="270" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
<li class="pos_6"><a href="http://www.miaov.com"><img src="images/7.jpg" width="270" alt="妙味课堂 www.miaov.com" longdesc="http://www.miaov.com" /></a></li>
</ul>
</div>
<p id="footer"><a href="http://www.miaov.com">妙味课堂 - www.miaov.com</a></p>
</body>
</html>
<script type="text/javascript" src="../../startmove.js"></script>
<script type="text/javascript">
/*初始宽度*/
// 使用函数自执行写法，防止全局污染
(function(){
var picList = document.querySelectorAll('.picList>li');
for(var i = 0; i <picList.length;i++){
// 为什么要加个[0]？
var img = picList[i].getElementsByTagName("img")[0];
css(picList[i],"width",img.width);
img.style.width = "100%";
}
})();
/* 左侧按钮的鼠标移入移出动画 */
(function(){
// 由于prev内部的元素层级都比它自身高，盖在它上面，所以如果在prev上加onmouseover或者onmouseout,实际上鼠标根本移动不到prev上，所以添加一个层级较高的prevBtn来防止干扰，nextBtn同理
var prevBtn = document.querySelector('.prev_div');
var prev = document.querySelector('.prev');
var prevSpan = prev.querySelectorAll('span');
prevBtn.onmouseover = function(){
startMove({
el: prevSpan[1],
target: {
left: 12
},
time: 300,
type: "easeBoth"
});
startMove({
el: prevSpan[0],
target: {
opacity:1,
left: 12
},
time: 300,
type: "easeBoth"
});
startMove({
el: prevSpan[2],
target: {
opacity:1,
left: 53
},
time: 300,
type: "easeBoth"
});
};
prevBtn.onmouseout = function(){
startMove({
el: prevSpan[1],
target: {
left: 0
},
time: 300,
type: "easeBoth"
});
startMove({
el: prevSpan[0],
target: {
opacity:0,
left: 0
},
time: 300,
type: "easeBoth"
});
startMove({
el: prevSpan[2],
target: {
opacity:0,
left: 65
},
time: 300,
type: "easeBoth"
});
};
})();
/* 右侧按钮的鼠标移入移出动画 */
(function(){
var nextBtn = document.querySelector('.next_div');
var next = document.querySelector('.next');
var nextSpan = next.querySelectorAll('span');
nextBtn.onmouseover = function(){
startMove({
el: nextSpan[1],
target: {
right: 12
},
time: 300,
type: "easeBoth"
});
startMove({
el: nextSpan[0],
target: {
opacity:1,
right: 12
},
time: 300,
type: "easeBoth"
});
startMove({
el: nextSpan[2],
target: {
opacity:1,
right: 53
},
time: 300,
type: "easeBoth"
});
};
nextBtn.onmouseout = function(){
startMove({
el: nextSpan[1],
target: {
right: 0
},
time: 300,
type: "easeBoth"
});
startMove({
el: nextSpan[0],
target: {
opacity:0,
right: 0
},
time: 300,
type: "easeBoth"
});
startMove({
el: nextSpan[2],
target: {
opacity:0,
right: 65
},
time: 300,
type: "easeBoth"
});
};
})();
/*
点击切换动画
*/
(function(){
var wrap = document.querySelector('#automatic');
var prevBtn = document.querySelector('.prev_div');
var nextBtn = document.querySelector('.next_div');
var picList = document.querySelectorAll('.picList>li');
var line = document.querySelector('.line');
var attrs = [];
var timer = 0;
for(var i = 0; i <picList.length; i++){
// 先给li在数组中对应的空间内添加一个对象，用于存储它的各项属性数据
attrs[i] = {};
attrs[i].width = css(picList[i],"width");
attrs[i].left = css(picList[i],"left");
attrs[i].top = css(picList[i],"top");
attrs[i].opacity = css(picList[i],"opacity");
attrs[i].zIndex = css(picList[i],"zIndex");
}
prevBtn.onclick = function(){
attrs.push(attrs.shift());
setStyle();
};
nextBtn.onclick = function(){
attrs.unshift(attrs.pop());
setStyle();
};
function setStyle(){
css(line,"opacity",0);
for(var i = 0; i <picList.length; i++){
// css(picList[i],"left",attrs[i].left);
// css(picList[i],"top",attrs[i].top);
// css(picList[i],"opacity",attrs[i].opacity);
// css(picList[i],"zIndex",attrs[i].zIndex);
// 让图片提前显示出来再变化样式
css(picList[i],"zIndex",attrs[i].zIndex);
startMove({
el: picList[i],
target: attrs[i],
time: 500,
type: "easeOut",
callBack: function(){
startMove({
el:line,
target:{opacity:1},
time: 200,
type: "easeOut",
callBack:function(){
console.log(1);
}
});
}
});
}
}
timer = setInterval(function(){
nextBtn.onclick();
},3000);
wrap.onmouseover = function(){
clearInterval(timer);
}
wrap.onmouseout = function(){
timer = setInterval(function(){
nextBtn.onclick();
},3000);
}
})();
</script>

//动画形式公式
var Tween = {
linear: function (t, b, c, d){
return c*t/d + b;
},
easeIn: function(t, b, c, d){
return c*(t/=d)*t + b;
},
easeOut: function(t, b, c, d){
return -c *(t/=d)*(t-2) + b;
},
easeBoth: function(t, b, c, d){
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){
return c*(t/=d)*t*t*t + b;
},
easeOutStrong: function(t, b, c, d){
return -c * ((t=t/d-1)*t*t*t - 1) + b;
},
easeBothStrong: function(t, b, c, d){
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){
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){
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){
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 = 2.70158; //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){
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;
}
}
// 获取或者设置样式
function css(el,attr,val){
if(arguments.length == 2){
if(el.currentStyle){
val = el.currentStyle[attr];
} else {
val = getComputedStyle(el)[attr];
}
return parseFloat(val);
} else {
if(attr == "opacity"){
el.style.opacity = val;
el.style.filter = "alpha(opacity= "+val*100+")";
} else {
el.style[attr] = val + "px";
}
}
}
//执行动画
function startMove(init){
clearInterval(init.el.timer);
var t = 0;
var b = {};
var c = {};
var d = init.time/20;
for( var s in init.target){
b[s] = css(init.el,s);
c[s] = init.target[s] - b[s];
}
init.el.timer = setInterval(function(){
t++;
if(t > d){
clearInterval(init.el.timer);
init.callBack&&init.callBack();
} else {
for(var s in init.target){
var val = Tween[init.type](t,b[s],c[s],d);
css(init.el,s,val);
}
}
},20);
}

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原文地址：https://www.cnblogs.com/catEatBird/p/6965087.html