Instruction: Explain how to create and type a custom hook in React using TypeScript, providing code examples.
Context: Evaluates the candidate's proficiency in leveraging TypeScript within React applications, focusing on the creation and typing of custom hooks to encapsulate and reuse stateful logic.
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Custom hooks in React are a powerful feature that allow us to encapsulate and reuse logic across components without tying ourselves to a component's structure. When combined with TypeScript, custom hooks not only offer a way to share logic but also significantly improve the development experience through type safety and better tooling. For instance, consider a custom hook that fetches data from an API and manages loading and error states. Using TypeScript, we can precisely define the types of data we expect, making our components more predictable and easier to debug.
To create a typed custom hook in React using TypeScript, let's start with a simple example. Imagine we have a hook useFetch that fetches data from an API:...