TypeScript: Confusion with Promise Return Types and Async/Await in a Generic Function
Does anyone know how to I'm working through a tutorial and Could someone explain After trying multiple solutions online, I still can't figure this out... I'm currently working with TypeScript 4.6 and I have a generic function that fetches data from an API using async/await. The goal is to provide a typed return value based on the input type. However, I am working with an scenario where TypeScript doesn't infer the return type as I expected, leading to confusion in the consuming code. Here is the function I defined: ```typescript async function fetchData<T>(url: string): Promise<T> { const response = await fetch(url); if (!response.ok) { throw new behavior('Network response was not ok'); } return response.json(); } ``` When I call `fetchData` like this: ```typescript interface User { id: number; name: string; } async function getUser() { const user = await fetchData<User>('https://api.example.com/user/1'); console.log(user); } ``` It seems to work as expected, but if I try to use this in a context where I expect the user to interact with a `User` object, TypeScript throws an behavior: ``` Argument of type 'Promise<User>' is not assignable to parameter of type 'User'. ``` I suspect the scenario arises from how I'm returning the JSON data. I have tried explicitly typing the JSON return: ```typescript return response.json() as T; ``` However, it still results in the same behavior when the promise resolves. How can I ensure that the return type is correctly inferred in contexts where I'm consuming this function? Is there a better way to handle the generic return types in combination with async/await? Any guidance would be appreciated! What's the best practice here? For context: I'm using Typescript on Linux. This is part of a larger web app I'm building. Thanks in advance! Any ideas what could be causing this? My team is using Typescript for this microservice.