import {Component, NgModule, VERSION} from '@angular/core'
import {BrowserModule} from '@angular/platform-browser'

@Component({
  selector: 'my-app',
  template: `
    <div>
      <a href = "#" (click) = "on()">{{value}}</a>
    </div>
  `,
})
export class App {

  value  = "View";
  toogle = true;

  on(val:boolean){
    //either this
    this.value = (!this.toogle)?"View":"Hide";
    this.toogle = !this.toogle;

    //or this
    this.value = (this.value == "View")?"Hide":"View"; // and remove toogle
  }

}

@NgModule({
  imports: [ BrowserModule ],
  declarations: [ App ],
  bootstrap: [ App ]
})
export class AppModule {}

PLUNKER链接- https://plnkr.co/edit/Wt8s8HSraBsnx9PzgDrA?p=preview

PLUNKER LINK - https://plnkr.co/edit/Wt8s8HSraBsnx9PzgDrA?p=preview