mirror of
https://gitee.com/element-plus/element-plus.git
synced 2024-12-05 04:37:47 +08:00
17 lines
584 B
TypeScript
17 lines
584 B
TypeScript
type OptionalKeys<T extends Record<string, unknown>> = {
|
|
[K in keyof T]: T extends Record<K, T[K]>
|
|
? never
|
|
: K
|
|
}[keyof T]
|
|
|
|
type RequiredKeys<T extends Record<string, unknown>> = Exclude<keyof T, OptionalKeys<T>>
|
|
|
|
type MonoArgEmitter<T, Keys extends keyof T> = <K extends Keys>(evt: K, arg?: T[K]) => void
|
|
|
|
type BiArgEmitter<T, Keys extends keyof T> = <K extends Keys>(evt: K, arg: T[K]) => void
|
|
|
|
export type EventEmitter<T extends Record<string, unknown>> =
|
|
MonoArgEmitter<T, OptionalKeys<T>> & BiArgEmitter<T, RequiredKeys<T>>
|
|
|
|
type A = Required<Record<string, unknown>>
|