js随机点名原生js实现随机点名

时间:2021-01-29 昨夜小楼又东风。人气:1

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>随机点名</title>
</head>

<body>
 <h1 class="name" id="names">点名</h1>
 <input type="button" value="开始" id=start_btn>
 <input type="button" value="结束" id=stop_btn disabled>
 <script>"../DOM/tools.js"</script>
 <script>
  let arrName = ["肖巍", "杨恩", "小菊花", "二狗", "小强", "小湉湉", "弯弯姐", "陈锴", "徐阳", "陈阳吉", "张胜江", "我", "波哥", "阿汤哥", "杰哥", "薛老板"];
  let names = document.querySelector("h1");
  let start_btn = document.querySelector("#start_btn");
  let stop_btn = document.querySelector("#stop_btn");
  let i, timer; 

  function creatRandom(min, max) {
   if (!max) {
    [max, min] = [min, 0];
   }
   let number = parseInt(Math.random() * (max - min + 1) + min);
   return number;
  }
  start_btn.onclick = function () {
   stop_btn.disabled ? stop_btn.disabled = false : stop_btn.disabled = true;
   start_btn.disabled ? start_btn.disabled = false : start_btn.disabled = true;
   timer = setInterval(() => {
    i = creatRandom(0, arrName.length - 1);
    names.innerHTML = arrName[i];
   }, 100);
  };
  stop_btn.onclick = function () {
   stop_btn.disabled ? stop_btn.disabled = false : stop_btn.disabled = true;
   start_btn.disabled ? start_btn.disabled = false : start_btn.disabled = true;
   console.log(arrName [i]);
   clearInterval(timer);
   arrName.splice(i, 1);
   if(!arrName.length){
    start_btn.disabled=true;
    stop_btn.disabled=true;
    names.innerHTML = "抽奖完毕";
   }
  };
 </script>
</body>

</html>

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js随机点名 原生js实现随机点名

js随机点名原生js实现随机点名