GUI 编程有用有限状态机代替 OOP 的吗？

const FSM = function () { this.states = []; this.current = undefined; this.enabled = true; }; FSM.prototype.add = function (name, enter, leave, ...event_foo_pairs) { let state = { __name__: name, enter: enter, leave: leave }; event_foo_pairs.forEach(pairs => state[pairs[0]] = pairs[1]); this.states.push(state); this.states.length === 1 && this.go(name); }; FSM.prototype.go = function (name, ...var_args) { const prev = this.states.filter(i => i.__name__ === this.current) const can_leave = prev.map(i => i.leave()).reduce((p, n) => p && n, true); if (can_leave) { const next = this.states.filter(i => i.__name__ === name); next.length === 0 && console.error('No such next jump: ', name); this.current = name; const ret = next.map(i => i.enter.apply(this, var_args)).reduce((p, n) => p && n, true); return ret; } else { console.warn('Can\'t leave state: ', this.current); console.warn(new Error().stack); return false; } }; FSM.prototype.fire = function (event, ...var_args) { return this.states.filter(i => i.__name__ === this.current && i.hasOwnProperty(event)).map(s => s[event]).map(i => i.apply(this, var_args)); };