欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  web前端

利用JavaScript制作九九乘法表实例教程

程序员文章站 2022-04-24 20:44:35
...

效果图:


图片:1.png

利用JavaScript制作九九乘法表实例教程

代码如下:

<!DOCTYPE html>
<html lang="en">
<head> 
<meta charset="UTF-8"> 
<title>span实现的乘法表</title> 
<style type="text/css"> 
 .wrap {
   width: 800px;
   margin: 20px auto;
      -webkit-user-select: none;
         -moz-user-select: none;   
         -ms-user-select: none;
   user-select: none;  }
  
  span {
   padding: 3px;
   font-weight: 700;
   display: inline-block;
   line-height: 30px;
   border-bottom: 2px solid #000000;
   border-left: 2px solid #000000;
   width: 80px;
   cursor: pointer;  }  .last {
   margin-top: -2px;
   border-top: 2px solid #000000;
   border-right: 2px solid #000000;  }  
  .bg0 {
   background-color: yellow;  }  
  .bg1 {
   background-color: lawngreen;  }  
  .bg2 {
   background-color: lightblue;  }  
  .hover {
   background-color: #BB3BD9;  } 
  .only{
   background-color: lightsalmon;  } 
   </style>
   </head>
   <body>
   <script> 
          function multiplication(a) { 
           var str = '<p class="wrap">'; 
            for (var i = 1; i <= a; i++) {  
             for (var j = 1; j <= i; j++) {   
              var curstr = j + ' x ' + i + '= ' + i * j;
    j !== i ? str += '<span class="' + 'bg' + (i % 3) + '">' + curstr + '</span>' : str += '<span class="' + 'last bg' + (i % 3) + '">' + curstr + '</span>';   }  }
  str += "</p>";
  document.write(str); }
 i
  
 multiplication(9);  
 var oSpans = document.getElementsByTagName("span"); 
 for (var i = 0; i < oSpans.length; i++) {
  oSpans[i].onclick = function () {   //alert("我是第 "+parseInt(this.innerHTML)+" 行");
   alert(this.innerHTML + " 我在第 " + this.innerHTML.charAt(4) + " 行"); 
    }
  oSpans[i].onmouseover = function () {   //console.log(111);  
   var num = this.innerHTML.charAt(4);   //console.log(num); 
     for (var j = 0; j < oSpans.length; j++) {   
      if (oSpans[j].innerHTML.charAt(4) === num) {
     oSpans[j].classList.add("hover");  
       }  
        }  
         this.classList.add("only"); 
          }
  oSpans[i].onmouseout = function () {  
   var num = this.innerHTML.charAt(4);  
    for (var j = 0; j < oSpans.length; j++) {   
     if (oSpans[j].innerHTML.charAt(4) === num) {
     oSpans[j].classList.remove("hover");  
       } 
         }  
          this.classList.remove("only"); 
           }
            }
            </script>
            </body>
            /html>

以上就是利用JavaScript制作九九乘法表实例教程的详细内容,更多请关注其它相关文章!