在angular8的eCommerce站点下单后如何重置观察值？

import { ReplaySubject, Subject } from 'rxjs';

private orderSubject: ReplaySubject<any> = new ReplaySubject<any>(1);

placeOrder() {
  // 下单逻辑...

  // 订单提交成功后发送订单数据到观察对象
  this.orderSubject.next(orderData);
}

private resetSubject: Subject<any> = new Subject<any>();

ngOnInit() {
  // 订阅orderSubject对象
  this.orderSubject.subscribe((orderData) => {
    // 处理订单数据...

    // 重置观察值
    this.resetSubject.next();
  });
}

this.resetSubject.subscribe(() => {
  // 执行重置操作，例如清空表单数据或重新加载页面等
});