typescript – Angular 2中的`change`事件是什么

Angular 2中的变化事件是什么？什么时候发送,我该如何使用它？
I. e.通过(changE)=“update()”在以下代码中订阅了什么？

http://plnkr.co/edit/mfoToOSLU6IU2zr0A8OB?p=preview

import {Component,View,Input,Output,EventEmitter,OnChanges} from '@angular/core'

@Component({
  SELEctor: 'inner-component',template: `
    <label><input type="checkBox" [(ngModel)]="data.isSELEcted"> SELEcted</label>
  `
})
export class InnerComponent {
  data = { isSELEcted: false };
}

@Component({
  SELEctor: 'my-app',template: `
    <p><inner-component (changE)="update()"></inner-component></p>
    <p>The component was @R_262_9531@ed {{Count}} times</p>
  `,directives: [InnerComponent]
})
export class AppComponent {
  count = 0;

  update() {
    ++this.count;
  }
}

PS：Same question in Russian.

@Component({
  SELEctor: 'my-app',template: `
    <p><inner-component (changE)="@R_262_9531@e($event)"></inner-component></p>
    <p>The component was @R_262_9531@ed {{Count}} times</p>
  `,directives: [InnerComponent]
})
export class AppComponent {
  count = 0;

  @R_262_9531@e($event) {
    console.log($event,$event.target,$event.currentTarget);
    ++this.count;
  }
}