TypeScript in Practice

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1. 1 How do you type a React component's props and children well, and why avoid `React.FC`? Medium
2. 2 What's the difference between `as const` and a type annotation for a config object? Medium
3. 3 How do you safely type `JSON.parse` output, and why is `any` a footgun there? Medium
4. 4 What are `.d.ts` declaration files, and how do you add types for an untyped library? Medium
5. 5 How does `tsc` type-checking relate to what actually ships — does TS affect the runtime bundle? Medium
6. 6 How do you incrementally migrate a large JavaScript codebase to TypeScript? Hard