Tim Deschryver • 10/18/2021

Stop misusing TypeScript type assertions

This article details a common TypeScript anti-pattern: the misuse of type assertions (like 'as Customer'). It explains how this creates a false sense of type safety, as it bypasses compiler checks for missing or extra properties. The author provides code examples contrasting assertions with proper type annotations and return types, and suggests enabling the ESLint rule 'consistent-type-assertions' to enforce better practices.

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#TypeScript #type safety #type annotations