TypeScript: Difficulty With Union Types and Function Overloading in React Component Props
I tried several approaches but none seem to work. I'm experiencing issues with union types and function overloading in a React component using TypeScript. I have a component that accepts props which can either be an object with a property of type `string` or a function that returns a `string`. However, when I try to implement this, TypeScript throws an behavior regarding the type incompatibility. Here’s what I have: ```typescript interface StringProp { text: string; } type PropType = StringProp | (() => string); const ExampleComponent: React.FC<PropType> = (props) => { // Trying to access props.text or call props as a function const displayText = typeof props === 'function' ? props() : props.text; return <div>{displayText}</div>; }; ``` When I try to compile, TypeScript complains with the behavior: ``` Argument of type 'PropType' is not assignable to parameter of type 'string | (() => string)'. Type 'StringProp' is not assignable to type 'string | (() => string)'. ``` I’ve attempted to structure the types in different ways, including using type guards, but I need to seem to get the function overload to work correctly. Here’s a variation I tried: ```typescript const ExampleComponent: React.FC<StringProp | (() => string)> = (props) => { // type guard to check if props is a function const displayText = typeof props === 'function' ? props() : props.text; return <div>{displayText}</div>; }; ``` This approach still leads to the same behavior. I've also tried breaking down the types into more specific interfaces but nothing seems to resolve the conflict. The goal is to allow both a plain string input and a function that can generate a string dynamically. Any insights on how to properly implement this in TypeScript while keeping the code clean and type-safe would be greatly appreciated! My development environment is Windows. Any help would be greatly appreciated! What am I doing wrong?