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How to implement the double-color ball function in JS

亚连Original: 2018-06-08 11:09:472801browse

This article mainly introduces the double-color ball function implemented by native JS, involving javascript random number generation and numerical operation related operation skills. Friends in need can refer to it

The example of this article describes the double-color ball function implemented by native JS . Share it with everyone for your reference, the details are as follows:

Let’s take a look at the running effect first:

The specific code is as follows:

<!DOCTYPE html>
<html>
<head lang="en">
  <meta charset="UTF-8">
  <title>www.jb51.net - JS双色球</title>
  <style>
    #datePicker {
      width: 100px;
      height: 30px;
      line-height: 30px;;
      border-radius: 10px;
      border: 1px solid #5098a5;
      text-align: center;
      cursor: pointer;
    }
    #number {
      height: 100px;
      float: left;
      margin-top: 20px;
    }
    #number span {
      display: block;
      width: 30px;
      height: 30px;
      line-height: 30px;
      text-align: center;
      border-radius: 30px;
      border: 2px solid red;
      color: red;
      font-weight: bold;
      float: left;
      margin-top: 15px;
      margin-right: 10px;
    }
    #buleBall {
      height: 100px;
      margin-top: 21px;
      float: left;
    }
    #buleBall span {
      display: block;
      width: 30px;
      height: 30px;
      line-height: 30px;
      text-align: center;
      border-radius: 30px;
      background-color: blue;
      color: white;
      font-weight: bold;
      float: left;
      margin-top: 15px;
      margin-right: 10px;
    }
  </style>
</head>
<body>
<p class="container">
  <p style="overflow:hidden;">
    <p id="number"></p>
    <p id="buleBall"></p>
  </p>
  <p id="datePicker">点击按钮</p>
</p>
<script>
  //循环产生1-36数字
  var arr = [];
  function num() {
    for (var i = 1; i < 34; i++) {
      arr.push(i);
    }
    confusion();
  }
  var arrty= new Array(arr);
  //伪随机方法
  function confusion(){
    for(var i=1;i<34;i++){
      arrty[i]=i;
    }
    arrty.sort(function(){ return 0.5 - Math.random() });
//    var str=arrty.join();
    arrAy()
  }
  // 将随机获取的数据添加到页面上去
  function arrAy() {
    var array = getRandomArrayElements(arrty, 6);
    array.sort(function (a, b) {//数组排序
      return a > b ? 1 : -1;
    });
    var htm = "";
    for (var i = 0; i < array.length; i++) {
      htm += &#39;<span>&#39; + array[i] + &#39;</span>&#39;;
    }
    document.getElementById(&#39;number&#39;).innerHTML = htm;
  }
  // 从1-36中随机取出其中6个参数
  function getRandomArrayElements(arr, count) {
    var shuffled = arr.slice(0), i = arr.length, min = i - count, temp, index;
    while (i-- > min) {
      index = Math.floor((i + 1) * Math.random());
      temp = shuffled[index];
      shuffled[index] = shuffled[i];
      shuffled[i] = temp;
    }
    return shuffled.slice(min);
  }
  //随机获取一个蓝球的方法
  function blueBall() {
    var html = "";
    var array = [];
    for (var k = 1; k < 17; k++) {
      array.push(k);
    }
    //随机生成蓝色球的算法
    var n = Math.floor(Math.random() * array.length);
    if (n != "0") {//去除获取到的篮球数为0的
      html += &#39;<span>&#39; + n + &#39;</span>&#39;;
    }
    document.getElementById(&#39;buleBall&#39;).innerHTML = html;
  }
  window.onload = function () {
    var datePicker = document.getElementById("datePicker");
    datePicker.onclick = function () {
      num();//点击按钮生成1-33的数字方法
      blueBall();//点击后获取随机蓝球的方法
    };
  }
</script>
</body>
</html>

Above I compiled it for everyone. I hope it will be helpful to everyone in the future.

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