typescript-types

To make invalid UI states unrepresentable in TypeScript, replace boolean flags with discriminated unions. This ensures state transitions are exhaustive and predictable at compile time, preventing illegal combinations from being constructed.

The parse-don't-validate pattern for API data in TypeScript frontend implements boundary parsing at runtime edges. Data is parsed and transformed into trusted types before entering the application core, ensuring only validated domain models are used internally.

Prevent cross-tenant ID leaks in a TypeScript microfrontend by using branded IDs. This technique makes structurally identical IDs nominally distinct at the type level, causing the compiler to reject mismatched ID assignments across different tenants.

Use unknown instead of any for strict type safety in TypeScript. Unknown forces you to narrow types using type guards before operating on the data, eliminating silent failures and ensuring all runtime edge cases are explicitly handled.

Yes, strict tsconfig settings are required for discriminated unions and boundary parsing. Strict mode enables essential compiler checks like strictNullChecks, which are necessary to enforce type safety and eliminate illegal states at compile time.

Refactor boolean flag soup into a tagged union in TypeScript by grouping state into a discriminated union with a common literal property. This enforces exhaustive state transitions and predictable rendering logic during frontend architecture refactoring.