2852 - OmitByType

Answer TestCases

从 T 中选择属性，且属性的类型不是 U

例如:

type OmitBoolean = OmitByType<
  {
    name: string
    count: number
    isReadonly: boolean
    isEnable: boolean
  },
  boolean
> // { name: string; count: number }

Solution

type OmitByType<T, U> = {
  [P in keyof T as T[P] extends U ? never : P]: T[P]
}

遍历 keyof T, 判断属性类型是否属于 U

T[P] extends U ? never : P

属于，则不返回