TS1064
The return type of an async function or method must be the global Promise<T> type. Did you mean to write 'Promise<{0}>'?
Async functions which try to declare non-promise return type will throw this error, because async functions and methods always return a promise:
class A {
async method(): number {
return 1;
}
}Fix: Correct the return type
Correct the return type:
class A {
async method(): Promise<number> {
return 1;
}
}