h5 - 转盘抽奖
转盘抽奖，在 h5 页面中还是比较常见的，并且用 css+js，vue，react 分别实现了。
vue、react 实现的效果一致，只是运用了不同的框架。其中 vue 实现的已经应用于实际，而 react 实现的算是“练手”。
用 css 布局实现转盘效果，包括闪烁的灯、转盘、指针等，没有应用任何图片，js 实现抽奖效果。目的是练习自己的基本功，css布局 + 原生js的能力。
css+js做的抽奖界面有个bug
原代码:
let rotateItemDeg = (res.location - 1) * (360 / this.lottery.length);
应改为:
let rotateItemDeg = (7 - res.location) * (360 / this.lottery.length);
这个地方会导致后台计算的奖品和前端显示的不符，原因在于奖品旋转的角度不对，举例位置2的奖品应旋转300度，原代码里转了30度
感谢po主这么简洁好看的抽奖界面，我不太会前端在这上面做修改省了很多事，帮您修正一下其他人若需要了可以修改这一处～
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