3. 列表循环、渲染

*ngFor

# app.component.ts
import { Component } from '@angular/core';
@Component({
  //根主键
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  title = 'my-app';
  list:Array<number> = [1,2,3];
}

# app.component.html
<div *ngFor="let item of list">
    {{item}}
</div>