【96页】最底部示例代码 setter 缺少 receiver 入参

[YisenFE]

line 03 缺少 receiver 入参

书中：

set(target, key, newVal) {
  // 设置属性值
  const res = Reflect.set(target, key, newVal, receiver)
  // ...
}

应修改为：

set(target, key, newVal, receiver) {
  // 设置属性值
  const res = Reflect.set(target, key, newVal, receiver)
  // ...
}