element-plus/packages/utils/vue/props/util.ts
2022-06-01 08:00:27 +00:00

11 lines
341 B
TypeScript

export type Writable<T> = { -readonly [P in keyof T]: T[P] }
export type WritableArray<T> = T extends readonly any[] ? Writable<T> : T
export type IfNever<T, Y = true, N = false> = [T] extends [never] ? Y : N
export type IfUnknown<T, Y, N> = [unknown] extends [T] ? Y : N
export type UnknownToNever<T> = IfUnknown<T, never, T>
export {}