Yes - you've just described a reducer function (ala Redux and React's `useReducer`). Note that to be a _true_ Finite State Machine, the reducer function would

Yes - you've just described a reducer function (ala Redux and React's `useReducer`). Note that to be a _true_ Finite State Machine, the reducer function would need to be written to first check what state value it's currently in, _then_ decide if the input is relevant. Most Redux reducers are not actually written that way - they just update the state value based on the action, regardless of what the existing state was. References: - https://redux.js.org/style-guide/#treat-reducers-as-state-machines https://redux.js.org/style-guide/#treat-reducers-as-state-ma... - https://dev.to/davidkpiano/redux-is-half-of-a-pattern-1-2-1hd7 https://dev.to/davidkpiano/redux-is-half-of-a-pattern-1-2-1h... (source: I maintain Redux, and that Redux style guide entry and the additional blog post were written by David Khourshid, who is an expert on state machines.)