J_Xin_Yu的博客

一、配置路由**1、创建项目时选择路由****2、在app-routing.module.ts文件中引入组件并配置路由**import { NewsComponent } from './components/news/news.component';import { HomeComponent } from './components/home/home.component';import { ProductComponent } from './components/product/produ

get第一步：在app.module.tsimport { HttpClientModule } from ‘@angular/common/http’imports: [BrowserModule,AppRoutingModule,HttpClientModule],第二步：在组件import { HttpClient } from ‘@angular/common/http’constructor(public http:HttpClient) { }this.http.get(a

父组件访问子组件，以news包含footer为例1、@ViewChild(’’)①在父组件引入子组件的html中给子组件加id<app-footer #footer>②在父组件中引入ViewChildimport { Component, OnInit, ViewChild } from ‘@angular/core’;引入子组件@ViewChild(‘footer’) footer:any2、@output EventEmitter①在子组件中引入import {