原JS实现banner图的常用功能

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我是靠谱客的博主爱听歌小土豆，这篇文章主要介绍原JS实现banner图的常用功能，现在分享给大家，希望可以做个参考。

虽然，用jQuery实现banner图的各种效果十分简单快捷，但是我今天用css+js代码实现了几个banner图的常用功能，效果还不错。

此次，主要想实现以下功能：

　　1. banner图循环不间断切换

　　2. 通过自制按钮实现指定性banner图的切换

　　3. 通过方向按钮实现banner图左/右定向依次切换

　　4. 当banner图存在onmouseover事件时，停止banner切换，当存在onmouseout时继续切换

复制代码

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title></title>
    <style type="text/css">
      #banner{
        width: 716.8px;
        height: 537.6px;
        background-color: aquamarine;
        margin: 100px auto;
        position: relative;
        font-size: 0px;    /*清除img图片间的回车符产生的间隔*/
        overflow: hidden;
      }
      #banner #bannerImg{
        width: 100%;
        position: absolute;
        top: 0px;
        left: 0px;
        white-space: nowrap;  /*使这个图片能一行显示*/
        transition:all 1s linear;
      }
      #banner #bannerImg .img{
        width: 100%;
      }
      #banner #bannerButton{
        font-size: 16px;
        color: white;
        position: absolute;
        bottom: 10px;
        left: 20px;
      }
      #banner #bannerButton .Button{
        border-radius: 9px;
        border: none;
        outline: none;
        cursor: pointer;
        background-color: #7FFFD4;
      }
      #banner #bannerButtonAside .div1{
        position: absolute;
        right: 10px;
        top: 50%;
        margin-top: -32px;
        cursor: pointer;
      }
      
      #banner #bannerButtonAside .div2{
        position: absolute;
        left: 10px;
        top: 50%;
        margin-top: -32px;
        cursor: pointer;
      }
    </style>
  </head>
  <body>
    
    <section id="banner" onmouseover="changeStop()" onmouseout="changeStart()">
      
      
      <div id="bannerImg">
        <img class="img" src="../img/c95d7b9676ae739cccfc55457b93fe9c.jpg"/>
        <img class="img" src="../img/5f5bdebddd8f1d276aeac8af5f8fa38d.jpg"/>
        <img class="img" src="../img/5f5e5c091ecb0525fc8204f200670dd9.jpg"/>
        <img class="img" src="../img/efa11cad9094f951061ee21324277efe.jpg"/>
        <img class="img" src="../img/0b54c021bd4384c168d835dfc0908018.jpg"/>
        <img class="img" src="../img/25d10d413faca3bdd7e2d88667f4298f_看图王.jpg"/>
        <img class="img" src="../img/c95d7b9676ae739cccfc55457b93fe9c.jpg"/>  
      </div>
      
      
      <div id="bannerButton">
        <button class="Button" onclick="buttonChange(0)">1</button>
        <button class="Button" onclick="buttonChange(1)">2</button>
        <button class="Button" onclick="buttonChange(2)">3</button>
        <button class="Button" onclick="buttonChange(3)">4</button>
        <button class="Button" onclick="buttonChange(4)">5</button>
        <button class="Button" onclick="buttonChange(5)">6</button>
      </div>
      
      
      <div id="bannerButtonAside">
        <div class="div1" onclick="asideChange(1)">
          <img src="../img/forword.png"/>
        </div>
        <div class="div2" onclick="asideChange(0)">
          <img src="../img/back.png"/>
        </div>
      </div>
    </section>
  </body>
  
  <script type="text/javascript">
    var bannerImg=document.getElementById("bannerImg");  /*取出img容器的节点*/
    var Button=document.getElementsByClassName("Button");  /*取出所有的button按钮*/
    var num=0;   /*定义全局变量num,控制banner的切换次序*/
    var aaa=0;   /*定义一个全局变量,用来取定时器函数,并在没有鼠标事件的时候清除定时器*/
      
    /*通过定时器实现banner图的每3000毫秒切换一次的效果的changeStart()函数*/
    function changeStart(){
        aaa=setInterval(function(){
        if (num<=6) {
          bannerImg.style.transition="all 1s linear";
          bannerImg.style.left=(-716.8)*(num)+"px";
          num++;
        }else{
          bannerImg.style.transition="all 0s linear";    /*消除num=0时,bannerImg移动的过渡效果*/
          num=0;
          bannerImg.style.left=(-716.8)*(num)+"px";
          
        }
        console.log("哈哈哈继续");
      },3000)
    }
    changeStart();
    
    /*以下是当鼠标悬浮在banner图上时,图片停止自动切换的changeStop()函数*/
    function changeStop(){
      clearInterval(aaa);  
      console.log("停止他");
    }
    
    /*以下是点击按钮实现对应banner图切换的change()函数*/
    function buttonChange(Num){
      num=Num+1;
      bannerImg.style.transition="all 0s linear";
      bannerImg.style.left=(-716.8)*(Num)+"px";
    }
    
    /*以下是点击左右两个按钮实现banner图切换的buttonChange()函数*/
    function asideChange(x){  /*通过传递形参x,判断往左/往右切换banner图*/
      if (num!=6&&x==1) {
        num++;
      }else if(num==6&&x==1){
        num=0;
      }else if(num!=0&&x==0){
        num--;
      }
      else if(num==0&&x==0){
        num=5;
      }
      bannerImg.style.transition="all 0s linear";
      bannerImg.style.left=(-716.8)*(num)+"px";
    }
  </script>
</html>

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title></title>
    <style type="text/css">
      #banner{
        width: 716.8px;
        height: 537.6px;
        background-color: aquamarine;
        margin: 100px auto;
        position: relative;
        font-size: 0px;    /*清除img图片间的回车符产生的间隔*/
        overflow: hidden;
      }
      #banner #bannerImg{
        width: 100%;
        position: absolute;
        top: 0px;
        left: 0px;
        white-space: nowrap;  /*使这个图片能一行显示*/
        transition:all 1s linear;
      }
      #banner #bannerImg .img{
        width: 100%;
      }
      #banner #bannerButton{
        font-size: 16px;
        color: white;
        position: absolute;
        bottom: 10px;
        left: 20px;
      }
      #banner #bannerButton .Button{
        border-radius: 9px;
        border: none;
        outline: none;
        cursor: pointer;
        background-color: #7FFFD4;
      }
      #banner #bannerButtonAside .div1{
        position: absolute;
        right: 10px;
        top: 50%;
        margin-top: -32px;
        cursor: pointer;
      }
      
      #banner #bannerButtonAside .div2{
        position: absolute;
        left: 10px;
        top: 50%;
        margin-top: -32px;
        cursor: pointer;
      }
    </style>
  </head>
  <body>
    <!--实现 左右按钮，1234，自动滑动，鼠标停上显示小手不动 暂停。-->
    <section id="banner" onmouseover="changeStop()" onmouseout="changeStart()">
      
      <!--以下是我们的banner图-->
      <div id="bannerImg">
        <img class="img" src="../img/c95d7b9676ae739cccfc55457b93fe9c.jpg"/>
        <img class="img" src="../img/5f5bdebddd8f1d276aeac8af5f8fa38d.jpg"/>
        <img class="img" src="../img/5f5e5c091ecb0525fc8204f200670dd9.jpg"/>
        <img class="img" src="../img/efa11cad9094f951061ee21324277efe.jpg"/>
        <img class="img" src="../img/0b54c021bd4384c168d835dfc0908018.jpg"/>
        <img class="img" src="../img/25d10d413faca3bdd7e2d88667f4298f_看图王.jpg"/>
        <img class="img" src="../img/c95d7b9676ae739cccfc55457b93fe9c.jpg"/>  <!--第7张与第一张为同一图片，消除图片切换间断-->
      </div>
      
      <!--以下是我们左下方的banner图按钮-->
      <div id="bannerButton">
        <button class="Button" onclick="buttonChange(0)">1</button>
        <button class="Button" onclick="buttonChange(1)">2</button>
        <button class="Button" onclick="buttonChange(2)">3</button>
        <button class="Button" onclick="buttonChange(3)">4</button>
        <button class="Button" onclick="buttonChange(4)">5</button>
        <button class="Button" onclick="buttonChange(5)">6</button>
      </div>
      
      <!--以下是我们左右两个方向按钮-->
      <div id="bannerButtonAside">
        <div class="div1" onclick="asideChange(1)">
          <img src="../img/forword.png"/>
        </div>
        <div class="div2" onclick="asideChange(0)">
          <img src="../img/back.png"/>
        </div>
      </div>
    </section>
  </body>
  
  <script type="text/javascript">
    var bannerImg=document.getElementById("bannerImg");  /*取出img容器的节点*/
    var Button=document.getElementsByClassName("Button");  /*取出所有的button按钮*/
    var num=0;   /*定义全局变量num,控制banner的切换次序*/
    var aaa=0;   /*定义一个全局变量,用来取定时器函数,并在没有鼠标事件的时候清除定时器*/
      
    /*通过定时器实现banner图的每3000毫秒切换一次的效果的changeStart()函数*/
    function changeStart(){
        aaa=setInterval(function(){
        if (num<=6) {
          bannerImg.style.transition="all 1s linear";
          bannerImg.style.left=(-716.8)*(num)+"px";
          num++;
        }else{
          bannerImg.style.transition="all 0s linear";    /*消除num=0时,bannerImg移动的过渡效果*/
          num=0;
          bannerImg.style.left=(-716.8)*(num)+"px";
          
        }
        console.log("哈哈哈继续");
      },3000)
    }
    changeStart();
    
    /*以下是当鼠标悬浮在banner图上时,图片停止自动切换的changeStop()函数*/
    function changeStop(){
      clearInterval(aaa);  
      console.log("停止他");
    }
    
    /*以下是点击按钮实现对应banner图切换的change()函数*/
    function buttonChange(Num){
      num=Num+1;
      bannerImg.style.transition="all 0s linear";
      bannerImg.style.left=(-716.8)*(Num)+"px";
    }
    
    /*以下是点击左右两个按钮实现banner图切换的buttonChange()函数*/
    function asideChange(x){  /*通过传递形参x,判断往左/往右切换banner图*/
      if (num!=6&&x==1) {
        num++;
      }else if(num==6&&x==1){
        num=0;
      }else if(num!=0&&x==0){
        num--;
      }
      else if(num==0&&x==0){
        num=5;
      }
      bannerImg.style.transition="all 0s linear";
      bannerImg.style.left=(-716.8)*(num)+"px";
    }
  </script>
</html>