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Key TypeScript Lessons Developers Wish They Had Learned Earlier

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A developer reflecting on their TypeScript journey highlights several practical lessons learned through real frontend project experience. One early mistake was over-annotating variables, when TypeScript can already infer types like string or number automatically from assigned values. Overusing the 'any' type was another pitfall, as it bypasses TypeScript's core benefits and should be replaced with properly defined types wherever possible. The article also notes that explicit type definitions serve as built-in documentation, making functions easier to understand without needing additional comments. Finally, the developer advises beginners not to overthink the choice between 'type' and 'interface', recommending they start coding and learn the differences organically.

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