angular组件继承的实现方法第1/2页

import { Component, ElementRef, Input, HostBinding, HostListener, OnInit } from '@angular/core'; @Component({
  selector: 'exe-base', // template will not be inherited template: `
  <div>
    exe-base：我是base组件么? - {{isBase}}
  </div>
 ` }) export class BaseComponent implements OnInit { @Input() isBase: boolean = true; @HostBinding('style.color') color = 'blue'; // will be inherited @HostListener('click', ['$event']) // will be inherited onClick(event: Event) { console.log(`I am BaseComponent`);
  } constructor(protected eleRef: ElementRef) { }

  ngOnInit() { console.dir('BaseComponent：ngOnInit method has been called');
  }
}

import { Component, HostListener, OnChanges, SimpleChanges } from '@angular/core'; import { BaseComponent } from './exe-base.component'; @Component({
  selector: 'exe-inherited',
  template: `
  <div>
   exe-inherited：我是base组件么? - {{isBase}}
  </div>
 ` }) export class InheritedComponent extends BaseComponent implements OnChanges { @HostListener('click', ['$event']) // overridden onClick(event: Event) { console.log(`I am InheritedComponent`);
  }
  ngOnChanges(changes: SimpleChanges) { console.dir(this.eleRef); // this.eleRef.nativeElement：exe-inherited }
}

import { Component, OnInit } from '@angular/core'; import {ManagerService} from "./manager.service"; @Component({
 selector: 'exe-app',
 template: `
  <exe-base></exe-base>
  <hr/>
  <exe-inherited [isBase]="false"></exe-inherited>
 ` }) export class AppComponent {
 currentPage: number = 1;
 totalPage: number = 5;
}

import { Component, Input, Output, EventEmitter } from '@angular/core'; @Component({
  selector: 'simple-pagination',
  template: `
    <button (click)="previousPage()" [disabled]="!hasPrevious()">Previous</button> 
    <button (click)="nextPage()" [disabled]="!hasNext()">Next</button>
    <p>page {{ page }} of {{ pageCount }} </p>
  ` }) export class SimplePaginationComponent { @Input() pageCount: number; @Input() page: number; @Output() pageChanged = new EventEmitter<number>();

  nextPage() { this.pageChanged.emit(++this.page);
  }

  previousPage() { this.pageChanged.emit(--this.page);
  }

  hasPrevious(): boolean { return this.page > 1;
  }

  hasNext(): boolean { return this.page < this.pageCount;
  }
}

import { Component, OnInit } from '@angular/core'; import {ManagerService} from "./manager.service"; @Component({
 selector: 'exe-app',
 template: `
  <simple-pagination 
                        
  

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