我在使用 TypeScript 时遇到了问题，该代码在普通 JS 上运行良好

我从 TypeScript 中收到此错误：

`Element implicitly has an 'any' type because expression of type 'string' can't be used to index type '{}'`

const data = [{
  Department: 'HR',
  Name: 'Tom'
},{
  Department: 'Finance',
  Name: 'Peter'
},{
  Department: 'HR',
  Name: 'Jane'
}]

const groups = {}
for (const { Name, Department } of data) {
  if (!groups[Department]) groups[Department] = { title: Department, people: [] }
  groups[Department].people.push(Name)
}
console.log(Object.values(groups))

.as-console-wrapper { max-height: 100% !important; top: 0; }

我尝试添加 Props

type Props = {
  title?: string
  people?: string[]
}

const groups: Props | undefined = {}

但我仍然收到类似的错误

`Element implicitly has an 'any' type because expression of type 'string' can't be used to index type 'Props'.`