???? ?? ??

TypeScript? ???? ??? ???? ??? ??, ?? ?? ???? ?? ??? ??? ???? ??? ? ????. ?? ??? ???? ?? ?? ?? ??? ?? ?? ??? ???? ? ? ?? ??? ? ????.

TypeScript?? ReturnType ? Awaited ??

TypeScript? ??? ? ??? ?? ??? ???? ?? ??? ?? ????. TypeScript? ??? ???? ReturnType??? ??? ???? ??? ?????. ??? ?? ??? ???? ?? ??? ???????.

1.???? ?? ?? ??

??? ?? ??? ?????ReturnType????? ??? ??? ? ????. ?? ??? ????.

function foo() {
const something:string = ""
return something;
}

function async fooWithAsync() {
const something:string = ""
return something;
}

// Promise? ?????.

? ????

foo ??? ???? ?????.

ReturnType? foo? ?? ??? ???? ?????.
2.???? ?? ??

??? ??? ??? ? ?? ??? Promise???. ?? ??? ????.

MyReturnType = ReturnType ??

? ????

fooWithAsync ??? ???? ???? Promise? ?????.

ReturnType? Promise? ?? ??? ?????.

3.???? ??? ?? Waited ??

??? ???? ??? Promise? ?? ??? ???? Awaited ???? ??? ??? ? ????. ??? ??? ????.

type MyAsyncReturnType = Awaited<ReturnType<typeof foo>>

? ????

ReturnType? ??? ?????.

???>?Promise? ?? ??? ???? ?????.

??:

ReturnType: ??? ?? ??? ?????.
??: Promise ??? ?????.

export const getEvents = async (user: User): Promise<ApiResponse> => {
const eventsApiUrl: string = `${PROMOS_END_POINTS.EVENTS}`;
const apiInstance: AxiosInstance = getAxiosInstance(user, API_SERVICES.PROMOTIONS);
const response: AxiosResponse = await apiInstance.get(eventsApiUrl);
return response.data;
};

type OfferEvent = Awaited<ReturnType<typeof getEvents>>;

const initEvent:OfferEvent = {event:[]}

??? ???? ??? ???? TypeScript?? ?? ? ??? ??? ?? ??? ????? ??? ? ????.

*TypeScript?? ??? ???? ?? ?? ??
*
TypeScript??? ??? ??? ?? ??? ???? ?? ???? ?? ??? ???? ??? ? ????. ?? ???? ??? ??? ?? ????? ??? ? ?? ?????. ??? MyReturnTypeWithCondition ?? ??? ??? ????? ???????.

type MyReturnTypeWithCondition<T> = T extends (...args: any[]) => infer R ? R : never;

????

Conditional Check:?T extends (...args: any[]) => infer R

T? ?? ???? ???? ?????.
...args: any[] ??? ?? ?? ??? ?????.
infer R ???? ??? ?? ??? ?? ?? R? ?????.

??:?? R : ??

T? ?? ??? ?? ?? ??? ??? ?? ??? R? ?????.
T? ?? ??? ?? ?? never? ?????.
?? ??

?? ??? ??? ?? ?? ?????.

function foo() {
const something:string = ""
return something;
}

function async fooWithAsync() {
const something:string = ""
return something;
}

?? ??? ReturnType? ??? ???.
?? ??? ??? ???? ?? ?????. ??? ?? ??? ???? ?? ReturnType? never? ???.

? ?? ??? ???? ??? ???? ??? ???? ??? ? ?? ???? ??? ?? ????? ?? ? ????. ?? ?? ???? ?? ?? ???? ????? TypeScript? ??? ?????.

TypeScript?? ?? ?? ? ???

TypeScript? ??? ? ? ??? ??? ??? ?? ?? ???? ?????? ???? ?? ??? ????. ?? ?? ??? ?? ???? ??? ??? ??? ? ????. ? ????? ? ?? ??? ???? ??, ??? ??? ? ??? ??? ??, ??? ??? ???? ???? ??? ?????.

1.?? ?? ??? ??

TypeScript?? ? ?? ??? ???? ?? ???? ?????. ?? ??(&)? ???? ?? ??? ? ????. OfferSummaryWithoutConfig? OfferTypeConfiguration? ? ?? ?????? ?? ?? ????? ??? ??? ?????.

type MyAsyncReturnType = Awaited<ReturnType<typeof foo>>

?? ??(&)? ???? ? ? ?????? ??? ? ????.

export const getEvents = async (user: User): Promise<ApiResponse> => {
const eventsApiUrl: string = `${PROMOS_END_POINTS.EVENTS}`;
const apiInstance: AxiosInstance = getAxiosInstance(user, API_SERVICES.PROMOTIONS);
const response: AxiosResponse = await apiInstance.get(eventsApiUrl);
return response.data;
};

type OfferEvent = Awaited<ReturnType<typeof getEvents>>;

const initEvent:OfferEvent = {event:[]}

??? ?? OfferSummaryWithoutConfig ? OfferTypeConfiguration? ?? ??? ???? ??? ??? ?????.

2.??? ?? ??? ???

??? ???? ?? ??? ??? ???? ??? ?? ??? ? ????. ??? ??? ? ?? ?? ???? Prettify?? ???? ??? ???? ???.

type MyReturnTypeWithCondition<T> = T extends (...args: any[]) => infer R ? R : never;

? ???? ??? T ??? ?? ???? ????? ?? ??? ? ???? ?? ?? ????.

??? ??? ? Prettify ???? ??? ???? ?? ??? ??? ? ????

Conditional Check:?T extends (...args: any[]) => infer R

3.???? ??? ???? ????

??? ??? ??? ?? ??? ????? ????? ???? ??? ???? ? ??? ????, ???? ?? ???? ??? ? ????.

IsExact: ? ??? ??? ???? ?????.

type ExampleFunction = (x: number, y: string) => boolean;
type ReturnType = MyReturnTypeWithCondition<ExampleFunction>; 
// ReturnType will be boolean

IsIdentical: ??? ??? ???? ? ??? ?????.

IsIdentical? ?????. = T? U? ?????? (U ?? T ? true : false) : false;

IsEqual: ? ?? ?? ??? ?? ??? ?????.

export interface OfferSummaryWithoutConfig {
  id: string;
  auditInfo: AuditInfo;
  offerBasicInfo: OfferBasicInfo;
  metaData: MetaData;
  conditionGroupsSummary: ConditionGroupsSummary[];
  rewardGroupsSummary: RewardGroupsSummary[];
  userOperations: ActionPermission;
}

export interface OfferTypeConfiguration {
  id: number;
  name: string;
  description: string;
  configuration: Configuration;
}

??? ???? ??? ???? CombinedType? ?? ?? OfferSummary? ????? ????? ??? ??? ? ????.

type CombinedType = OfferSummaryWithoutConfig & {
  offerTypeConfiguration: OfferTypeConfiguration;
};

?? ??

?? ?? ?? ??? ?????.

type Prettify<T> = {

};

? ??? TypeScript : ???? ???? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!