EmitFn Type — vue Architecture

Source Code

types/v3-setup-context.d.ts lines 16–30

export type EmitFn<
  Options = ObjectEmitsOptions,
  Event extends keyof Options = keyof Options,
  ReturnType extends void | Vue = void
> = Options extends Array<infer V>
  ? (event: V, ...args: any[]) => ReturnType
  : {} extends Options // if the emit is empty object (usually the default value for emit) should be converted to function
  ? (event: string, ...args: any[]) => ReturnType
  : UnionToIntersection<
      {
        [key in Event]: Options[key] extends (...args: infer Args) => any
          ? (event: key, ...args: Args) => ReturnType
          : (event: key, ...args: any[]) => ReturnType
      }[Event]
    >