在 Angular 中，我可以将组件发出的 output 直接绑定到属性吗？

Question

My main application component interacts with sub components through @Output decorated properties on the subcomponent. The output properties use and EventEmitter<>() . Often the property emits a simple boolean or number. I would like to bind this output directly to properties in the main application. But am failing to do so.

What I am doing at the moment is:

//In my sub component:
@Output() subProperty = new EventEmitter<boolean>();

//In my main template:
<sub-component (subProperty)="setPropertyValue($event)"></subcomponent>

//In my main component (this I would like to avoid):
setPropertyValue(event) {
    this.mainProperty = event;
}

What I wanted to do was avoid the function in my main component and bind directly to my property, but the below code doesn't work:

//In my sub component:
@Output() subProperty = new EventEmitter<boolean>();

//In my main template:
<sub-component (subProperty)="mainProperty"></subcomponent>

Is there anyway I can avoid the additional function in my main component?

Answer 1

我相信您能做的最好的是：

(subProperty)="mainProperty = $event"

Answer 2

Add the suffix Change to the end of your property so you can use the banana/football in the box syntax. A matching input is not required and will be ignored.

//In your sub component:
@Output() subPropertyChange = new EventEmitter<boolean>();

//In your main template:
<sub-component [(subProperty)]="mainProperty"></subcomponent>