eewing
19 lines
553 B
JavaScript
19 lines
553 B
JavaScript
import { simpleBox } from "svelte-toolbelt";
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export class StateMachine {
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state;
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#machine;
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constructor(initialState, machine) {
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this.state = simpleBox(initialState);
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this.#machine = machine;
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this.dispatch = this.dispatch.bind(this);
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}
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#reducer(event) {
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// @ts-expect-error state.current is keyof M
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const nextState = this.#machine[this.state.current][event];
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return nextState ?? this.state.current;
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}
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dispatch(event) {
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this.state.current = this.#reducer(event);
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}
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}
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