加了定时器刷新还是会出现动画时有时无的现象

# 具体遇到的问题

# 报错信息的截图

# 相关课程内容截图

# 尝试过的解决思路和结果

# 粘贴全部相关代码，切记添加代码注释（请勿截图）

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>封装形变类</title>
  <style type="text/css">
    .ball{
      background: linear-gradient(#ff9b9b 50%,#106dbb 50%);
      width:150px;
      height: 150px;
      border-radius: 50%;
    }
  </style>
</head>
<body>
  <div class="ball"></div>

  <script type="text/javascript" src="index.js"></script>
</body>
</html>

class Transform {
  _queue = [];
  constructor(selector) {
    this.el = document.querySelector(selector);
    this.el.style.transition = `all ${ .3 }s`;
    // this._queue = [];
  }
  // 位移
  translate(value, time) {
    return this._add('translate', value, time);
  }
  // 缩放
  scale(value, time) {
    return this._add('scale', value, time);

  }
  // 形变
  rotate(value, time) {
    return this._add('rotate', value, time);

  }

  // 添加动画
  _add(type, value, time) {
    this._queue.push({
      type,
      value,
      time
    })
    return this;
  }
  //添加完成,启动
  done() {
    this._start();
  }
  // 启动 从队列中把动画拿出来执行
  _start() {
    setTimeout(() => {
      const info = this._queue.shift();

      this.el.style.transform = this._getTransform(info);
    }, 0);

    const info = this._queue.shift();

    this.el.style.transform = this._getTransform(info);
  }

  _getTransform({
    time,
    value,
    type
  }) {
    switch (type) {
      case 'translate':
        return `translate(${ value })`;
    }
  }

}
const tf = new Transform('.ball');

tf.translate(`100px,100px`)
  .scale(2)
  .done()

console.log(tf);