JS怎么实现简单轮播图特效？（图文详解）

代码

引入MyTools.js库

1.html

 
 
 



 

 

 

 

 

 

 

 

 <
 >
 

 
 

2.css

*{margin: 0;padding: 0;}
a{
 color: #999;
 text-decoration: none;
 position: absolute;
 top: 50%;
 transform: translateY(-50%);
 background-color: rgba(0, 0, 0, .4);
}
a:hover{
 color: #f8b62b;
}
i{
 font-size: 50px;
 font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}
#box{
 height: 482px;
 width: 830px;
 background-color: red;
 position: absolute;
 left: 50%;
 top: 50%;
 transform: translate(-50%,-50%);
 overflow: hidden;
}
#box_content{
 height: 100%;
 width: 100%;
 cursor: pointer;
}
#box_content img{
 position: absolute;
 vertical-align: top;
 height: 100%;
 width: 100%;
 /*left: 830px;*/
}
.box_img{
 width: 100%;
 height: 100%;
 position: absolute;}
.box_control_right{
 position: absolute;
 right: 0;
}
.box_control_left{
 position: absolute;
 left: 0;
}
ul{
 position: absolute;
 bottom: 30px;
 left: 50%;
 transform: translateX(-50%);
 display: flex;
 justify-content:space-evenly;
}
ul>li{
 list-style: none;
 width: 16px;
 height: 16px;
 background-color: #fff;
 margin: 0 3px;
 border-radius: 50%;
 cursor: pointer;
}
ul>li.current{
 background-color: darkorange;
}

3.js

window.addEventListener(&＃39;load&＃39;,function (ev) {
 // 轮播图
 (function () {
 // 1. 获取需要标签
 var boxCOntent= myTool.$(&＃39;box_content&＃39;);
 var cOntentImg= boxContent.children;
 var boxCOntrol= myTool.$(&＃39;box_control&＃39;);
 var cOntrolBottom= boxControl.children[2];
 // 2. 全局索引
 var iNow = 0;
 // 3. 根据图片个数动态添加下方图片指示器
 for (var i = 0; i  iNow){
  myTool.slowMoving(contentImg[iNow],{&＃39;left&＃39;:-scrollImgWidth},null);
  contentImg[index].style.left = scrollImgWidth + &＃39;px&＃39;;
  }else if(index = contentImg.length) {
 iNow = 0;
 }
 contentImg[iNow].style.left = scrollImgWidth + &＃39;px&＃39;;
 myTool.slowMoving(contentImg[iNow], {"left": 0},null);
 // 切换索引
 changeIndex();
 }

 // 8. 设置定时器
 var timerId = setInterval(autoPlay,2000);
 // 9. 鼠标进入图片p后设置和清除定时器
 myTool.$(&＃39;box&＃39;).addEventListener(&＃39;mouseover&＃39;,function () {
 clearInterval(timerId);
 });
 myTool.$(&＃39;box&＃39;).addEventListener(&＃39;mouseout&＃39;,function () {
 timerId = setInterval(autoPlay,2000);
 });

 })();
},false);

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