在angularfire应用中创建时间戳对象

import { Component } from '@angular/core';
import { AngularFirestore } from '@angular/fire/firestore';
import firebase from 'firebase/app';

@Component({
  selector: 'app-example',
  template: `
    <button (click)="createTimestamp()">Create Timestamp</button>
  `,
})
export class ExampleComponent {
  constructor(private firestore: AngularFirestore) {}

  createTimestamp() {
    const timestamp = firebase.firestore.FieldValue.serverTimestamp();
    // 将时间戳对象写入到Firestore数据库中的某个文档字段
    this.firestore.collection('your-collection').doc('your-document').update({
      timestampField: timestamp
    });
  }
}