/TypeScript/Typescript get the promise return type

Typescript get the promise return type

type AsyncReturnType<T extends (...args: any) => any> =
	T extends (...args: any) => Promise<infer U> ? U :
	T extends (...args: any) => infer U ? U :
	any

Typescript get type from promise

function promiseOne() {
  return Promise.resolve(1)
}
    
const promisedOne = promiseOne()
    
// note PromiseLike instead of Promise, this lets it work on any thenable
type ThenArg<T> = T extends PromiseLike<infer U> ? U : T
    
type PromiseOneThenArg = ThenArg<typeof promisedOne> // => number
// or
type PromiseOneThenArg2 = ThenArg<ReturnType<typeof promiseOne>> // => number

Source: stackoverflow.com

Similar codes

0 vote184 views3 answers
Node rts stream
TypeScript
0 vote161 views1 answer
Fechas - Solución resta un día en dato
TypeScript
0 vote163 views1 answer
Latest unity version that supports 32 bit
TypeScript
0 vote199 views1 answer
Typescript checkbox event
TypeScript
1 vote190 views1 answer
Typescript exclude jest files
TypeScript
5 votes181 views5 answers
Angular 8 ngClass If
TypeScript
0 vote169 views1 answer
"Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepositoryInterface", but its service could not be found. Make sure the service exists and is tagged with "doctrine.repository_service".
TypeScript
2 votes181 views2 answers
How to close all ports angular
TypeScript
2 votes175 views1 answer
Aws sts assume-role example
TypeScript
0 vote170 views1 answer
Google sheets script save A RANGE to csv
TypeScript