XState: Typed State Machines
Model state machines with TypeScript in XState.
Why XState with TypeScript?
XState models application state as explicit state machines. With TypeScript, states, events, and context are fully typed, preventing invalid state transitions at compile time.
import { createMachine, assign } from "xstate";Defining Machine Types
XState v5 uses type parameters for context, events, and states. Define them before creating the machine.
type TrafficContext = { count: number };
type TrafficEvent =
| { type: "TURN_GREEN" }
| { type: "TURN_YELLOW" }
| { type: "TURN_RED" };All lessons in this course
- Typing Redux Toolkit Slices and Thunks
- Zustand Store Typing Patterns
- XState: Typed State Machines
- Derived State and Selectors with Types