const TOKEN = '123'
const ROOT = '//www.baidu.com'

const root = createAPI => (...args) => {
  const result = createAPI(...args)
  return {...result, url: `${ROOT}${result.url}`}
}

const auth = createAPI => (...args) => {
  const result = createAPI(...args)
  return {
    ...result,
    headers: {...result.headers, authorization: `Bearer ${TOKEN}`},
  }
}

const projects = team => {
  return {
    url: `/api/0/teams/${team}/projects/`,
  }
}

root(auth(projects))('fe')
// 返回值如下
{
   headers: {authorization: "Bearer 123"}
   url: "//www.baidu.com/api/0/teams/fe/projects/"
}

不理解这段函数式编程，看不懂,谁能详细解释下？

### 你期待的结果是什么？实际看到的错误信息又是什么？