Six TypeScript Features Experts Recommend Adopting First for Faster Bug Fixes

A developer who has onboarded multiple teams onto TypeScript recommends adopting features in a prioritized order rather than all at once to avoid frustration. The guide suggests enabling strict mode and noUncheckedIndexedAccess in tsconfig on day one, as these settings catch the most common bugs with minimal setup. Using discriminated union types and the unknown type instead of any helps enforce safer handling of external data from APIs, localStorage, and fetch calls. The satisfies keyword, introduced in TypeScript 4.9, allows config objects to be validated against a type while preserving literal types. For utility types, the author recommends starting with just four — Partial, Pick, Omit, and ReturnType — and avoiding complex conditional or mapped types in application code, where they tend to reduce readability.