原生js實(shí)現(xiàn)點(diǎn)擊輪播切換圖片-創(chuàng)新互聯(lián)

本文實(shí)例為大家分享了js實(shí)現(xiàn)點(diǎn)擊輪播切換圖片的具體代碼,供大家參考,具體內(nèi)容如下

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<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>點(diǎn)擊輪播圖</title>
</head>
<style>
    .container {
      position: relative;
      width: 600px;
      height: 400px;
      margin:100px auto 0 auto;
      box-shadow: 0 0 5px green;
      overflow: hidden;
    } 
    .wrap {
      position: absolute;
      width: 4200px;
      height: 400px;
      z-index: 1;
    }
    .container .wrap img {
      float: left;
      width: 600px;
      height: 400px;
    }
     .container .buttons {
      position: absolute;
      right: 40%;
      bottom:20px;     
      z-index: 2;
    }  
    .container .buttons span {
      margin-left: 10px;
      display: inline-block;
      width: 7px;
      height: 7px;     
      background-color: #D4D4D4;
      text-align: center;
      color:white;
      cursor: pointer;      
    }
    .container .buttons span.on{
      background-color: #558949;
    }
    .container .arrow {
      position: absolute;
      top: 35%;
      color: green;
      padding:0px 14px;
      border-radius: 50%;
      font-size: 50px;
      z-index: 2;
      display: none;
    }
</style>
<body>
  <div class="container">
    <div class="wrap" >
      <img alt="">
      <img src="./img/jd_app3.png" alt="">
      <img src="./img/jd_app4.png" alt="">
      <img src="./img/jd_app5.png" alt="">
      <img src="./img/jd_app6.png" alt="">
      <img src="./img/jd_app7.png" alt="">    
    </div>
    <div class="buttons">
      <span></span>
      <span></span>
      <span></span>
      <span></span>
      <span></span>
    </div>  
  </div>
  
  <script>
   var wrap = document.querySelector(".wrap");     
    var index = 0;
    var dots = document.getElementsByTagName("span");
    function showCurrentDot () {
      for(var i = 0, len = dots.length; i < len; i++){
        dots[i].className = "";
      }
      dots[index].className = "on";
    }
    index++;
      if(index > 4){
        index = 0;
      }
    index--;
    if(index < 0){
      index = 4;
    }
    showCurrentDot();
     for (var i = 0, len = dots.length; i < len; i++){
      (function(i){
        dots[i].onclick = function () {
          var dis = index - i;
          if(index == 4 && parseInt(wrap.style.left)!==-3000){
            dis = dis - 5;   
          }
          //和使用prev和next相同,在最開(kāi)始的照片5和最終的照片1在使用時(shí)會(huì)出現(xiàn)問(wèn)題,導(dǎo)致符號(hào)和位數(shù)的出錯(cuò),做相應(yīng)地處理即可
          if(index == 0 && parseInt(wrap.style.left)!== -600){
            dis = 5 + dis;
          }
          wrap.style.left = (parseInt(wrap.style.left) + dis * 600)+"px";
          index = i;
          showCurrentDot();
        }
      })(i);      
    }
  </script>
</body>
</html>

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