1
为什么此代码调用两次addHero方法?Angular2输入两次调用方法
@Component({
selector: 'little-tour',
template: `
<input #newHero
(keyup.enter)="addHero(newHero.value); newHero.value='' "
(blur)="addHero(newHero.value); newHero.value='' ">
<button (click)=addHero(newHero.value)>Add</button>
<ul><li *ngFor="let hero of heroes">{{hero}}</li></ul>
<p>{{pressed}}</p>
`
})
export class LittleTourComponent {
number = 1;
pressed='';
heroes = ['Windstorm', 'Bombasto', 'Magneta', 'Tornado'];
addHero(newHero: string) {
if (newHero) {
if (this.heroes.join('').indexOf(newHero) < 0) {
this.heroes.push(newHero);
}
this.pressed+=' **(into IF)** ';
}
//newHero= " ";
this.pressed+='pressed ' +this.number+', ';
this.number++;
}
}
这是一个例子:
(成IF)按压1,压制2,(成IF)按压3,按压4
什么是 “成IF”? –
当你做什么时,它会被调用两次? – philipooo
由于(模糊),addHero()被调用两次。为什么要添加hello ob模糊? – user3506588