JS打造九宫格抽奖的思路及实现代码

[
  {"id":1,"name":"iPhone","img":"//cdn/1.png"},
  {"id":2,"name":"现金50元","img":"//cdn/2.png"},
  {"id":3,"name":"HUAWEI","img":"//cdn/3.png"},
  {"id":4,"name":"现金10元","img":"//cdn/4.png"},
  {"id":5,"name":"谢谢参与","img":"//cdn/5.png"},
  {"id":6,"name":"手机优惠券","img":"//cdn/6.png"},
  {"id":7,"name":"电脑优惠券","img":"//cdn/7.png"},
  {"id":8,"name":"U盘","img":"//cdn/8.png"}
]

<div class="main">
        <div class="content-container">
            <div class="prize-list">
                <img src="./img/prize_1.png" alt="">
                <span>IphoneX</span>
            </div>
            <div class="prize-list">
                <img src="./img/prize_2.png" alt="">
                <span>现金50元</span>
            </div>
            <div class="prize-list">
                <img src="./img/prize_3.png" alt="">
                <span>HUAWEI</span>
            </div>
            <div class="prize-list">
                <img src="./img/prize_4.png" alt="">
                <span>现金10元</span>
            </div>
            <div class="prize-list">
                <img src="./img/prize_5.png" alt="">
                <span>谢谢参与</span>
            </div>
            <div class="prize-list">
                <img src="./img/prize_6.png" alt="">
                <span>手机优惠券</span>
            </div>
            <div class="prize-list">
                <img src="./img/prize_7.png" alt="">
                <span>电脑优惠券</span>
            </div>
            <div class="prize-list">
                <img src="./img/prize_8.png" alt="">
                <span>U盘</span>
            </div>
            <!-- 中心内容部分 -->
            <div class="handler-container">
                <div class="inner-container">
                    <img class="handler-left" src="./img/center_1.png" alt="">
                    <div class="handler-container-middle">
                        还可以抽奖 <span class="prize-number">0</span> 次
                    </div>
                    <div class="handler-container-btn"></div>
                </div>
            </div>
        </div>

        <div class="dialog-container">
            <div class="dialog-main">
                <div class="head">
                    <span class="title">温馨提示</span>
                    <span class="close">&times;</span>
                </div>
                <div class="content">
                    每次抽奖将消耗 8000 积分
                </div>
                <div class="dialog-main-footer">
                    <div class="button">再来一次</div>
                </div>
            </div>
        </div>
    </div>

  var runGame = function () {
    var random = Math.floor(Math.random() * 6000 + 3000)
    timer = setInterval(function () {
      random -= 200
      if (random < 200) {
        clearInterval(timer)
        timer = null
        openDialog()
        return
      }
      currentIndex = ++index % prizeList.length
      prizeList.forEach(function (node) {
        node.classList.remove('active')
      })
      prizeList[currentIndex].classList.add('active')
    }, 50)
  }