20 Mistakes That Quietly Destroy JavaScript/TypeScript Codebases
SMRTR summary
Silent bugs in JS/TS codebases rarely break builds but compound technical debt until they cause production incidents. This guide covers 10 foundational mistakes across type safety (strict mode, overusing `any`, missing return types), error handling (swallowed errors, unhandled rejections, the Result pattern), and architecture (dependency injection, circular imports, fat controllers). Fixing these early prevents cascading pain in everything built on top.
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