Angular如何实现类似博客的评论嵌套回复数据结构

import { Component, OnInit } from '@angular/core';import { HttpClient } from '@angular/common/http';@Component({...})export class CommentList implements OnInit {comments: any[] = [];constructor(private http: HttpClient) {}ngOnInit() {this.http.get('/api/comments').subscribe(data => {this.comments =>提交回复
组件通过向父组件传递提交事件，父组件处理HTTP请求并更新数据：
// ReplyForm组件@Output() submit = new EventEmitter<{parentId: string, content: string}>();submitReply() {if (this.replyContent.trim()) {this.submit.emit({parentId: this.parentId, content: this.replyContent});this.replyContent = '';}}// CommentItem组件处理提交submitReply(replyData: {parentId: string, content: string}) {this.http.post('/api/comments', {...replyData,author: this.currentUser // 当前登录用户信息}).subscribe(newComment => {// 更新本地数据：将新评论添加到对应父评论的childComments中const parentComment = this.findCommentById(this.comments, replyData.parentId);if (parentComment) {parentComment.childComments.push(newComment);}});}
点赞功能
点赞操作需区分“点赞”与“取消点赞”，并实时更新UI：
toggleLike() {const isLiked = this.comment.isLiked;this.likeCount += isLiked ? -1 : 1;this.comment.isLiked = !isLiked;this.http.post(`/api/comments/${this.comment.id}/like`, {isLiked}).subscribe({error: () => {// 回滚状态this.likeCount += isLiked ? 1 : -1;this.comment.isLiked = isLiked;}});}
性能优化策略
评论系统可能面临大量数据渲染问题，需通过以下方式优化性能：
基于Angular的博客评论系统通过合理的组件拆分、树形数据结构设计及状态管理，能够高效实现评论显示、多级回复及交互功能，结合虚拟滚动、懒加载等优化手段，可进一步提升用户体验，实际开发中，还需考虑错误处理（如网络请求失败）、输入校验（如敏感词过滤）及无障碍访问（ARIA属性）等细节,以构建健壮的评论模块。