XState is a TypeScript library for building state machines, statecharts, and actor-based systems to manage complex application logic. It provides a declarative way to define and execute finite state machines with support for nested states, parallel states, and side effects, making it useful for orchestrating workflows, managing intricate UI behavior, and handling background jobs. Developers use XState when they need a robust, visual, and maintainable alternative to scattered conditional logic for state-dependent behavior.

119 open issues · last updated Jul 21, 2026