5 Typescript tips you NEED to know

TypeScript widens types by default to allow flexibility, but you can use 'as const' to narrow them to literal types for stricter type checking. Discriminated unions help create flexible yet type-safe APIs by sharing a common property across different type variants. The 'satisfies' keyword preserves type specifics while ensuring type safety, unlike type annotations which widen types. Template literal types enable enforcing string patterns at the type level. Utility types like Required, Partial, Omit, and Pick help manipulate existing types, while optional chaining returns undefined when accessing optional properties.