@TRGWII or anyone else intimately familiar with typescript, I have

Question

@TRGWII or anyone else intimately familiar with typescript, I have

a question. Say I have an argument to a function that changes the return type. How do I represent that in Typescript? I tried this, but it doesn't work because type boolean is not assignable to true:

async function query<T>(queryOptions: QueryParams & { rawResponse: true }): Promise<Response<T>>
async function query<T>(queryOptions: QueryParams & { rawResponse: false }): Promise<T>
async function query<T>(queryOptions: QueryParams) {
// ...
}

0

30.07.2021

6 ответов

32 просмотра

Thomas

async function query<T, QP extends QueryParams>(queryOptions: QP): Promise<QP['rawResponse'] extends true ? Response<T> : QP['rawResponse'] extends false ? T : Response<T> | T>

0

30.07.2021

Watzon 🍉🇵🇸 Автор вопроса

Thomas
async function query<T, QP extends QueryParams>(qu...

You're a Typescript God

0

30.07.2021

Friday Candour [Ask to PM]

Watzon 🍉🇵🇸
You're a Typescript God

God?

0

30.07.2021

Thomas

Watzon 🍉🇵🇸
You're a Typescript God

Also extract your true false thing

0

30.07.2021

Thomas

Watzon 🍉🇵🇸
You're a Typescript God

type If<Cond extends boolean, IfTrue, IfFalse> = Cond extends true ? IfTrue : Cond extends false ? IfFalse : IfTrue | IfFalse; // usage: If<QP['rawResponse'], Response<T>, T>

0

30.07.2021

Thomas · Accepted Answer

Thomas

Lemme check...

0

30.07.2021

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