Why Your Cat Became a Dog (And TypeScript Finally Noticed)
Discover how JavaScript private fields change TypeScript from structural typing to nominal typing, creating hard boundaries between classes that look identical.
best practices
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How Intersection Types Replace Error Handling
Learn how to replace runtime validation with TypeScript intersection types for compile-time safety and cleaner code.
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Stop Committing Unformatted Code
Git hooks can automatically catch formatting and linting errors before they reach your repository. Learn how Lefthook makes this effortless with parallel execution and automatic fixes.
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Never Miss a Switch Case Again
Learn how to make TypeScript catch missing switch cases at compile time using the exhaustive switch pattern with the never type.
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Stop Using TypeScript's Exclamation Mark
The non-null assertion operator (!) tells TypeScript to trust you when you say a value isn't null or undefined. But this trust comes at a cost: runtime crashes that TypeScript could have prevented. Learn why this operator undermines type safety and what to use instead.