Retrieve a variable in a child component by passing it down from the parent component and triggering it from the parent

Question

Retrieve a variable in a child component by passing it down from the parent component and triggering it from the parent

I'm struggling to grasp this concept.

In my current scenario, I pass two variables to a component like this:

<app-selectcomp [plid]="plid" [codeId]="selectedCode" (notify)="getCompFromChild($event)"></app-selectcomp>

The variables I pass are plid and codeId.

Based on user actions with these variables, an array named response.data is generated.

To send this response.data to the parent component, I used the following method:

@Output() notify: EventEmitter<string> = new EventEmitter<string>(); 
this.notify.emit(this.response.data)

Then, in the parent component:

getCompFromChild(values): void {}

Everything functions properly, but I can only access the data from the parent component by triggering it from the child component, such as with a button click.

I haven't been able to figure out how to retrieve the value of response.data directly from the parent component. For instance, by clicking a button on the PARENT component.

<button type="submit" (click)="getDatainChild()">Get Child Data</button>

Thank you.

angular typescript

Answer 1

Answer №1

To achieve the desired functionality, you can utilize the @ViewChild() decorator in Angular. This allows the parent component to access and interact with the child component. Here is an example of how you can implement this:

In your parent component (.ts):

@ViewChild('childComponent') childComponent: ChildComponent; <= specify the type of your child component

In your parent component (.html)

<app-child-component #childComponent [input1]="value1" [input2]="value2" 
       (output)="handleOutput($event)">
</app-child-component>

In your child component (.ts), define a method that can be called by the parent component

public doSomething() { }

Now, you can invoke the doSomething() method of the child component from the parent component.

childComponent.doSomething();

Answer 2

To achieve the desired functionality, you can utilize the @ViewChild() decorator in Angular. This allows the parent component to access and interact with the child component. Here is an example of how you can implement this:

In your parent component (.ts):

@ViewChild('childComponent') childComponent: ChildComponent; <= specify the type of your child component

In your parent component (.html)

<app-child-component #childComponent [input1]="value1" [input2]="value2" 
       (output)="handleOutput($event)">
</app-child-component>

In your child component (.ts), define a method that can be called by the parent component

public doSomething() { }

Now, you can invoke the doSomething() method of the child component from the parent component.

childComponent.doSomething();

Retrieve a variable in a child component by passing it down from the parent component and triggering it from the parent

Answer №1

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