JavaScript实现随机点名小程序

Z时代
2024-01-10
分类：IT

本文实例为大家分享了JavaScript实现随机点名小程序的具体代码，供大家参考，具体内容如下

导入jar包

将jquery-3.3.1.min.js包导入到web目录下的js包

代码实现


<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>点名器</title>
 <style>
  body{
   background-color: gray;
  }
  .box{
   width: 1000px;
   height: 280px;
   margin: 0 auto;
   margin-top: 100px;
   clear: both;
  }
  #btn,#btn2,#btn3,#btnStop{
   width: 150px;
   height: 50px;
   margin-top: 50px;
   font-size: 18px;
  }
  .name{
   width: 100px;
   height: 30px;
   float: left;
   background-color: antiquewhite;
   margin-left: 10px;
   margin-top: 10px;
   text-align: center;
   line-height: 30px;
  }
  #span{
   float: right;
   position: relative;
   top: 55px;
   right: 185px;
  }
  h1{
   text-align: center;
  }
  .high{
   background-color: #FFDEAD;
   font-weight:500;
  }
 </style>
</head>
<body>
<h1>随机点名系统</h1>
<span id="span"></span>
<div class="box" id="box"></div>
<div style="text-align: center">
 <input type="button" id="btn" value="点名"/>
 <input type="button" id="btnStop" value="停止"/>
</div>
</body>
<script type="text/javascript" src="js/jquery-3.3.1.min.js"></script>
<script type="text/javascript">
 var arr = [ "张恒",
  "李伟",
  "文子昂",
  "李彦松",
  "廖彬",
  "金鑫",
  "夏华伶",
  "邓洪",
  "陈紫桥",
  "罗继财",
  "陈治豪",
  "李坤耀",
  "母天鑫",
  "冯思皓",
  "谷康杰",
  "李辉",
  "李先进",
  "米俊杰",
  "彭小平",
  "唐旭",
  "万云松",
  "向星宇",
  "张全鑫",
  "邬建科",
  "徐江涛",
  "李连辉",
  "肖云龙",
  "徐浪",
  "马俊杰",
  "欧阳平",
  "周雨凡"];
 //生成数组中的名单div并添加到box中
 let boxNode = document.getElementById("box");
 boxNode.innerHTML = "";
 //循环遍历数组
 for(let i = 0;i< arr.length;i++){
  //创建div元素
  let divNode = document.createElement("div");
  //设置div内容
  divNode.innerHTML = arr[i];
  //设置div样式
  divNode.className = "name";
  //添加到box元素中
  boxNode.appendChild(divNode);
 }
 let time = null
 //点击开始点名,开启一个循环定时器,绑定鼠标单击事件
 $("#btn").click(function () {
   time = setInterval(function () {
   //随机被选中的div设置背景颜色为红色
    let index = Math.floor(Math.random()*arr.length);
    //清除之前的颜色
    $("#box div").css("background-color","");
    //找到生成的名单div
    let mySelector = "#box div:eq("+ index+")";
    $(mySelector).css("background-color","red");
  },50);
 });
 //点击停止按钮清除定时器
 $("#btnStop").click(function () {
  clearInterval(time);
 })
</script>
</html>