React (web)

Opinionated patterns for React web apps: effects, async work, and conventions that keep hooks predictable and lint-friendly.

When to use

New or existing React web projects (TypeScript) where side effects and async flows should follow shared conventions
Code review or implementation questions about useEffect and promise-based work
Choosing or reviewing general-purpose JS utilities (debounce, chunk, object picks, lodash-style helpers) or date/time handling alongside React code
Adding or extending reference docs for topics this skill covers (routing, forms, data fetching libraries, etc.)

Prefer established libraries over ad-hoc helpers. Import specific functions so bundlers can tree-shake.

Focus	Doc / resources	When to use
General-purpose JS	es-toolkit	Debounce, chunk, object helpers; TypeScript-first types; optional `es-toolkit/compat` for lodash-shaped APIs; strong performance vs older utility stacks
Dates and time	date-fns · API docs	Format, parse, compare, and manipulate native `Date` values; locale-specific formatting via `date-fns/locale`; first-class time zone support in v4+