# State management · Tech watch [Canonical source]() Organizing and synchronizing application state across data and components. ## [React: making UI states explicit in the agentic era]() When an agent changes a UI, checking a single account cannot cover every role, plan, or feature flag. Matt Rothenberg shows how values scattered across hooks, providers, and layouts can hide overlooked states — such as a Delete button shown to a view-only user. Making display state an explicit component input lets teams render relevant combinations directly, test them, or compare them in a visual grid. Storybook and Playwright complement this approach, but they do not choose which scenarios to cover; that decision still matters. 2026-10-27 · [Markdown]() · [Original resource]() ## [Mutative: immutable updates without the spread syntax]() Mutative lets developers write mutations against a draft to produce a new immutable state, avoiding manual spread copies at every level. It also supports arrays, `Set` and `Map`, along with patches and optional freezing. Its benchmarks report a geometric mean 3.6 times faster than Immer with matched settings, or 6.6 times with each library’s defaults. Results vary by workload; hand-written reducers remain faster in most of the cases shown. 2026-10-23 · [Markdown]() · [Original resource]() ## [Share atomic frontend state with Nanostores]() Nanostores provides small composable state stores for React, Preact, Vue, and Svelte. Its atomic, tree-shakable design supports focused state without shipping unused code. 2026-05-01 · [Markdown]() · [Original resource]() ## [TinyBase for reactive, local-first JavaScript apps]() TinyBase is a reactive in-memory store for JavaScript and TypeScript apps, with persistence and synchronization. It provides building blocks for local-first experiences without prescribing one server architecture. 2026-03-08 · [Markdown]() · [Original resource]() ## [Clarify React Query states with pattern matching]() Gabriel Pichot organizes loading, error, success and empty states with pattern matching. The approach reduces scattered branches in components and improves readability. 2025-04-24 · [Markdown]() · [Original resource]() ## [React Agent Hooks: expose interface state to agents]() This library derives LLM tools from React hooks. Human and agent interfaces can share the same state, with a developer-defined schema controlling state changes. 2025-04-20 · [Markdown]() · [Original resource]() ## [Preact signals for reactive state management]() The guide introduces signals and automatic dependency tracking in Preact. It explains how state changes update the interface without repeated manual synchronization. 2025-02-15 · [Markdown]() · [Original resource]() ## [Normy: normalize data to simplify cache updates]() Normy normalizes data fetched through libraries such as React Query or SWR. Shared entities can then update across cached results without repeating synchronization logic. 2025-01-07 · [Markdown]() · [Original resource]() ## [Manage advanced URL filters in the Next.js App Router]() Aurora Scharff uses URL parameters as the source of truth for filtering, sorting and pagination. The article covers coordinating that state with interactions and Server Components. 2024-11-07 · [Markdown]() · [Original resource]() ## [Nuqs: synchronize React state with URL parameters]() Nuqs offers a useState-like API with typed parsers and history controls. It makes filters shareable and reloadable by keeping their state in the URL. 2024-11-04 · [Markdown]() · [Original resource]() ## [Synchronize a local-first Expo application with TinyBase]() This guide introduces TinyBase into an Expo application to combine reactive local data with synchronization. It covers sharing data across devices and users. 2024-10-06 · [Markdown]() · [Original resource]()