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extra-fsm
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Readme
The library supports both OOP and FP.
npm install --save extra-fsm
# or
yarn add extra-fsm
import { FiniteStateMachine, transition } from 'extra-fsm'
const schema = {
stopped: { start: 'running' }
, running: { stop: 'stopped' }
}
// OOP
const fsm = new FiniteStateMachine(schema, 'stopped')
fsm.send('start')
console.log(fsm.state) // running
// FP
const newState = transition(schema, 'stopped', 'start')
console.log(newState)// running
type IFiniteStateMachineSchema<
State extends string | number | symbol
, Event extends string | number | symbol
> = Record<State, Partial<Record<Event, State>>>
class FiniteStateMachine<
State extends string | number | symbol
, Event extends string | number | symbol
> {
get [Symbol.toStringTag](): string
get state(): State
constructor(
schema: IFiniteStateMachineSchema<State, Event>
, initialState: State
)
matches(state: State): boolean
can(event: Event): boolean
/**
* @throws {BadEventError}
*/
send(event: Event): void
}
interface IFiniteStateMachineStateChange<
State extends string | number | symbol
, Event extends string | number | symbol
> {
event: Event
oldState: State
newState: State
}
class ObservableFiniteStateMachine<
State extends string | number | symbol
, Event extends string | number | symbol
> extends FiniteStateMachine<State, Event> {
get [Symbol.toStringTag](): string
observeStateChanges(): Observable<IFiniteStateMachineStateChange<State, Event>>
}
export function transition<
State extends string | number | symbol
, Event extends string | number | symbol
, TransitionEvent extends Event
>(
schema: IFiniteStateMachineSchema<State, Event>
, state: State
, event: TransitionEvent
): State
function canTransition<
State extends string | number | symbol
, Event extends string | number | symbol
>(
schema: IFiniteStateMachineSchema<State, Event>
, state: State
, event: Event
) => boolean
FAQs
The library supports both OOP and FP.
The npm package extra-fsm receives a total of 810 weekly downloads. As such, extra-fsm popularity was classified as not popular.
We found that extra-fsm demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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