原生JS实现旋转轮播图+文字内容切换效果

 
 
 css/css.css" rel="external nofollow" />
 
 


 

  

   

    
    

    

    

    

    

   
   
   

    
    
   
  
  

    
学员
    
欧阳常斌3
  
 

@charset "UTF-8";
/*初始化 reset*/
blockquote,body,button,dd,dl,dt,fieldset,form,h1,h2,h3,h4,h5,h6,hr,input,legend,li,ol,p,pre,td,textarea,th,ul{margin:0;padding:0}
body,button,input,select,textarea{font:12px/1.5 "Microsoft YaHei", "微软雅黑", SimSun, "宋体", sans-serif;color: #666;}
ol,ul{list-style:none}
a{text-decoration:none}
fieldset,img{border:0;vertical-align:top;}
a,input,button,select,textarea{outline:none;}
a,button{cursor:pointer;}
.feedbackwrap{
 
 margin:auto;
 margin-top: 300px;
}
.feedbackslide {
 
 position: relative;
}
.feedbackslide li{
 position: absolute;
 left:30px;
 top:0;
}
.feedbackslide li img{
 width:100%;
 box-shadow:#d6d4d3 0px 0px 20px;
}
.feedbackarrow{
 opacity: 1;
}
.feedbackprev,.feedbacknext{
 
 
 position: absolute;
 top:50%;
 margin-top:-25px;
 background: url(../images/leftblue.png) no-repeat;
 z-index: 99;
}
.feedbacknext{
 right:0;
 background-image: url(../images/rightblue.png);
}
.feedbackname{
 width: 100%;
 margin-top: 26px;
 display: flex;
 flex-direction: column;
 align-items: center;
 justify-content: center;
}
.feedbackname .p1{
 font-size: 22px;
 color: #333;
 margin-bottom: 10px;
}
.feedbackname .p2{
 font-size: 18px;
 color: #666;
}

window.onload = function () {
 var arr = [
  { // 1
   width:120,
   top:11,
   left:87,
   opacity:20,
   zIndex:2
  },
  { // 2
   width:120,
   top:11,
   left:237,
   opacity:40,
   zIndex:3
  },
  { // 3
   width:144,
   top:0,
   left:387,
   opacity:100,
   zIndex:4
  },
  { // 4
   width:120,
   top:11,
   left:561,
   opacity:40,
   zIndex:3
  },
  { //5
   width:120,
   top:11,
   left:711,
   opacity:20,
   zIndex:2
  }
 ];
 //0.获取元素
 var feedbackslide = document.getElementById("feedbackslide");
 var feedbackliArr = feedbackslide.getElementsByTagName("li");
 var feedbackarrow = feedbackslide.children[1];
 var arrowChildren = feedbackarrow.children;
 var arrowleft=5;
 //设置一个开闭原则变量，点击以后修改这个值。
 var flag = true;
 move();
 //3.把两侧按钮绑定事件。(调用同一个方法，只有一个参数，true为正向旋转，false为反向旋转) 
 arrowChildren[0].onclick = function () {
  if(flag){
   flag = false;
   move(false);
  }
  arrowleft++;
  console.log("left+++",arrowleft)
  if(arrowleft==1){
   document.getElementById("feedstudent").innerText="小岳岳2";
  }else if(arrowleft==2){
   document.getElementById("feedstudent").innerText="张三峰1";
  }else if(arrowleft==3){
   document.getElementById("feedstudent").innerText="林动5";
  }else if(arrowleft==4){
   document.getElementById("feedstudent").innerText="令狐冲4";
  }else if(arrowleft==5){
   document.getElementById("feedstudent").innerText="欧阳常斌3";
   arrowleft=0;
  }else{
   document.getElementById("feedstudent").innerText="小岳岳2";
   arrowleft=1;
  }
 }
 arrowChildren[1].onclick = function () {
  if(flag){
   flag = false;
   move(true);
  }
  arrowleft--;
  console.log("right---",arrowleft)
  if(arrowleft==1){
   document.getElementById("feedstudent").innerText="小岳岳2";
  }else if(arrowleft==2){
   document.getElementById("feedstudent").innerText="张三峰1";
  }else if(arrowleft==3){
   document.getElementById("feedstudent").innerText="林动5";
  }else if(arrowleft==4){
   document.getElementById("feedstudent").innerText="令狐冲4";
  }else{
   document.getElementById("feedstudent").innerText="欧阳常斌3";
   arrowleft=5;
  }
 }
 //4.书写函数。
 function move(bool){
  //判断：如果等于undefined,那么就不执行这两个if语句
  if(bool === true || bool === false){
   if(bool){
    arr.unshift(arr.pop());
   }else{
    arr.push(arr.shift());
   }
  }
  //在次为页面上的所有li赋值属性，利用缓动框架
  for(var i=0;i

function show(ele){
 ele.style.display = "block";
}
/**
 * 获取元素样式兼容写法
 * @param ele
 * @param attr
 * @returns {*}
 */
function getStyle(ele,attr){
 if(window.getComputedStyle){
  return window.getComputedStyle(ele,null)[attr];
 }
 return ele.currentStyle[attr];
}
//参数变为3个
//参数变为3个
function animate(ele,json,fn){
 //先清定时器
 clearInterval(ele.timer);
 ele.timer = setInterval(function () {
  //开闭原则
  var bool = true;
  //遍历属性和值，分别单独处理json
  //attr == k(键) target == json[k](值)
  for(var k in json){
   //四部
   var leader;
   //判断如果属性为opacity的时候特殊获取值
   if(k === "opacity"){
    leader = getStyle(ele,k)*100 || 1;
   }else{
    leader = parseInt(getStyle(ele,k)) || 0;
   }
   //1.获取步长
   var step = (json[k] - leader)/10;
   //2.二次加工步长
   step = step>0?Math.ceil(step):Math.floor(step);
   leader = leader + step;
   //3.赋值
   //特殊情况特殊赋值
   if(k === "opacity"){
    ele.style[k] = leader/100;
    //兼容IE678
    ele.style.filter = "alpha(opacity="+leader+")";
    //如果是层级，一次行赋值成功，不需要缓动赋值
    //为什么？需求！
   }else if(k === "zIndex"){
    ele.style.zIndex = json[k];
   }else{
    ele.style[k] = leader + "px";
   }
   //4.清除定时器
   //判断: 目标值和当前值的差大于步长，就不能跳出循环
   //不考虑小数的情况：目标位置和当前位置不相等，就不能清除清除定时器。
   if(json[k] !== leader){
    bool = false;
   }
  }
  //只有所有的属性都到了指定位置，bool值才不会变成false；
  if(bool){
   clearInterval(ele.timer);
   //所有程序执行完毕了，现在可以执行回调函数了
   //只有传递了回调函数，才能执行
   if(fn){
    fn();
   }
  }
 },5);
}

//获取屏幕可视区域的宽高
function client(){
 if(window.innerHeight !== undefined){
  return {
   "width": window.innerWidth,
   "height": window.innerHeight
  }
 }else if(document.compatMode === "CSS1Compat"){
  return {
   "width": document.documentElement.clientWidth,
   "height": document.documentElement.clientHeight
  }
 }else{
  return {
   "width": document.body.clientWidth,
   "height": document.body.clientHeight
  }
 }
}