Open jasonwwl opened 3 months ago
TypeScript cannot correctly infer the type for response.body in got responses when using generics.
TypeScript infers the type of response.body as any despite specifying a generic type for the response, leading to loss of type safety.
TypeScript should infer the type of response.body based on the generic type specified in the got request, ensuring type safety.
import got, { Method, Response } from 'got'; interface ApiResponse<T> { code: number; message: string; result: T; success: boolean; timestamp: number; } async function fetchData<R>(url: string, method: Method, data?: unknown): Promise<R> { try { const response: Response<ApiResponse<R>> = await got<ApiResponse<R>>({ url, method, headers: { 'Content-Type': 'application/json' }, json: data, responseType: 'json' }); // this response.body is 'any' return response.body.result; } catch (e: any) { throw new Error(`Request failed: ${e.message}`); } } (async () => { const result = await fetchData<{ accessToken: string }>('https://example.com/api/token', 'POST', { key: 'value' }); console.log(result.accessToken); // TypeScript should infer the correct type here })();
I also have the same problem The code is sourced from official instances https://github.com/sindresorhus/got/blob/main/documentation/3-streams.md#events
Describe the bug
TypeScript cannot correctly infer the type for response.body in got responses when using generics.
Actual behavior
TypeScript infers the type of response.body as any despite specifying a generic type for the response, leading to loss of type safety.
Expected behavior
TypeScript should infer the type of response.body based on the generic type specified in the got request, ensuring type safety.
Code to reproduce
Checklist