A tutorial explaining how to implement and use user-defined type guards in TypeScript to conditionally apply logic based on variable types.
Explains a TypeScript type narrowing issue with Array.includes when using const assertions and how to work around it.
Explains why TypeScript restricts catch clause variable types and demonstrates the correct way to narrow error types using checks.
A guide to using type predicates and helper functions in TypeScript to safely check for object properties and narrow types.
Explains TypeScript type predicates, which narrow down variable types within functions using conditional checks.
