TypeScript: Conditional Types Not Resolving in Recursive Function Return Types
Does anyone know how to I'm attempting to set up I've searched everywhere and can't find a clear answer..... I'm working with an scenario with TypeScript where my recursive function's return type is not resolving correctly with conditional types. I'm trying to create a function that processes a nested object structure and returns either an array of values or a specific type based on the input. Here's my function: ```typescript type NestedObject = { [key: string]: string | NestedObject }; function processObject<T extends NestedObject>(obj: T): (T extends NestedObject ? string[] : string) { const results: string[] = []; for (const key in obj) { if (typeof obj[key] === 'string') { results.push(obj[key] as string); } else { results.push(...processObject(obj[key] as NestedObject)); } } return results; } ``` However, when I try to call `processObject`, I'm getting the following behavior: ``` Argument of type 'T' is not assignable to parameter of type 'NestedObject'. ``` I've ensured that `T` extends `NestedObject`, so I expected it to accept the input properly. I have also tried defining the return type explicitly, but the scenario continues. Example usage: ```typescript const input = { a: 'value1', b: { c: 'value2', d: { e: 'value3' } } }; const result = processObject(input); console.log(result); ``` I'm using TypeScript version 4.5.4. Any insights on how I can resolve this type behavior or improve this implementation would be greatly appreciated! I'm working on a application that needs to handle this. I'm working on a microservice that needs to handle this. This is part of a larger mobile app I'm building. I appreciate any insights! What's the best practice here?