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Master strict null checks in TypeScript with battle-tested patterns that eliminate runtime null errors without drowning your codebase in defensive checks.

Most TypeScript confusion stems from misunderstanding interface vs type. This guide cuts through years of debate with production-tested patterns, real performance data, and a decision framework that eliminates guesswork.

TypeScript 6.0's new isolatedModules default breaks const enums, namespaces, and type-only imports. Here's how to fix your build pipeline before deployment fails.