Vue

Angular @input 與 @output

將父元件資料傳到子元件

在子元件引入@angular/core ＝>Input
@input變數的窗口

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import { Component,Input } from '@angular/core';
import { CommonModule,Location } from '@angular/common';
import { RouterLink } from '@angular/router';

interface navListType{
  title: string,
  path: string,
}
@Component({
  selector: 'app-navbar', //這是元件的名稱
  standalone: true,
  imports: [
    RouterLink,CommonModule,
  ],
  templateUrl: './navbar.component.html',
  styleUrl: './navbar.component.scss'
})
export class NavbarComponent {
  @Input() navListsCurrent = '';
  @Input() npageTitleCurrent = '';
  @Input() isActiveCurrent = '';
  //點擊頁面按鈕函式
  actionList(path: string) {
    this.npageTitleCurrent = path;
  }
}

父元件
.ts

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import { Component, OnInit } from '@angular/core';
import { RouterOutlet ,RouterLink} from '@angular/router';
import {MatButtonModule} from '@angular/material/button';
import { ButtonModule } from 'primeng/button';
import { ToDoComponent } from './components/to-do/to-do.component';
import { NavbarComponent } from './components/navbar/navbar.component';

interface navListType{
  title: string,
  path: string,
}
@Component({
  selector: 'app-root',
  standalone: true,
  imports: [
    RouterOutlet,
    MatButtonModule,
    ButtonModule,
    ToDoComponent,
    NavbarComponent,
    RouterLink,
  ],
  templateUrl: './app.component.html',
  styleUrl: './app.component.scss'
})
export class AppComponent implements OnInit{
  normalValue='noValue'
  constructorValue="noValue"
  ngOnInitValue = "noValue"

  navLists: navListType[] = [
    { title: 'Home' ,path:'index'},
    {title:'FetchData',path:'fetch-data'}
  ]
  //頁面名稱
  pageTitle: string = 'Home';
  isActive: boolean = false;
  constructor() {
    console.log('constructor啟動了')
    this.constructorValue='從constructor取值'
    this.normalValue='從constructor取值'
  }
  ngOnInit(): void {
    console.log('ngOnInit啟動了')
    this.ngOnInitValue='從ngOnInit取值'
    this.normalValue='從ngOnInit取值'
  }
  title = 'tode_project';
}

html

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<main class="main">
   <app-navbar
   [navListsCurrent]="navLists"
   [npageTitleCurrent]="pageTitle"
   [isActiveCurrent]="pageTitle"
   ></app-navbar>

</main>
   <div>
   <div>normalValue的值:{{normalValue}}</div>
   <div> constructor的值:{{constructorValue}}</div>
    <div>ngOnInit的值:{{ngOnInitValue}}</div>
  </div>
<router-outlet />

@input 父向子傳遞資料


@input 父向子傳遞資料 官網