calling child component method in angular 6

calling child component method in angular 6

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I am trying to call the child component menthod from the parent ts file but i am unable to do call. getting error Cannot read property 'doSomething' of undefined.

 export class AddComponent implements OnInit, OnDestroy {
    public doSomething()
    {
       alert("Called");
    }
 }

Parent code :

@ViewChild(AddComponent) child:AddComponent;
 ngAfterViewInit() {
 this.child.doSomething();
}

parent html file

<span class="glyphicon glyphicon-plus addBack" title="Add new booking" (click)=" openActionModal(GridActions, $event, null, 'add')"
      style="float: right;margin-right: 10px;margin-top: 18px;"></span>

<ng-template #GridActions>
    <div class="modal-header">

      <button type="button" class="close pull-right" aria-label="Close" (click)="openConfirmationModal(EditConfirmation)">
        <span aria-hidden="true">&times;</span>
      </button>
    </div>
    <div class="modal-body">
      <app-add #child *ngIf="showModalAdd"> </app-add>
    </div>

  </ng-template>

You can do this by using @ViewChild

@Component({
 selector: 'child-cmp',
 template: '<p>child</p>'
})
class ChildCmp {
   doSomething() {}
 }

@Component({
  selector: 'some-cmp',
  template: '<child-cmp></child-cmp>',
 directives: [ChildCmp]
})
class SomeCmp {
 @ViewChild(ChildCmp) child:ChildCmp;
 ngAfterViewInit() {
    // child is set
    this.child.doSomething();
  }
}

Using string selector

@Component({
 selector: 'child-cmp',
 template: '<p>child</p>'
 })
class ChildCmp {
   doSomething() {}
}
@Component({
    selector: 'some-cmp',
    template: '<child-cmp #child></child-cmp>',
    directives: [ChildCmp]
})
class SomeCmp {
    @ViewChild('child') child:ChildCmp;
    ngAfterViewInit() {
    // child is set
    this.child.doSomething();
  }
} 

Hope this will help

how-to-call-child-componentss-method-from-the-parent-component , Starter project for Angular apps that exports to the Angular CLI. 6. 7. 8. 9. 10. 11 . import { Component } from '@angular/core';. @Component({. selector:  Angular apps are built as a hierarchy of components. When you build applications you will need to communicate between components, while services are a good way to share data between components, there are specific methods to carry out parent-child component communication. This tutorial will help us understand how we can share data between two sibling …


I believe you forgot to add child component selector in your parent template file.

parent.component.html

<add-component></add-component>

parent.component.ts

@ViewChild(AddComponent) child:AddComponent;
   ngAfterViewInit() {
   this.child.doSomething();
}

add.component.ts

export class AddComponent implements OnInit, OnDestroy {
    public doSomething()
    {
       alert("Called");
    }
 }

Hope this will solve your problem!

Angular, Angular - Call child component method from parent. app.component.html. < button (click)="callChild()"> Call child </button>. <button (click)="childcomp. Child Components. It’s just as easy to access a child component and call methods or access instance variables that are available on the child. Let’s say we have a child component with a whoAmI method like this: whoAmI() { return '👶 I am a child!!'; } We can then call that method from within our parent component class with ViewChild like


Did you make the reference in the HTML/template? You need to make Template Reference to call the ViewChild-

Let, your AddComponent's selector is add-component. So call this like below in HTML/template-

<add-component #child></add-component>

Angular – Call Child Component's Method in Parent Component's , Angular – Call Child Component's Method in Parent Component's Template 6. 7. 8. 9. 10. 11. import {Component} from '@angular/core';. In these methods, we use the emit() method of the nameEvent and phoneEvent properties, which are instances of EventEmitter. So this, of course, is where the data is getting passed up to the parent component. The Child Component Templates – Example # 4. In Example # 4 you’ll see the code for both of the child component templates.


Angular : how to call parent component function from child component, Step 6: Receive this function in child component. @Output(“parentFun”) parentFun: EventEmitter<any> = new EventEmitter();. Step 7: Now we can  The parent component itself has no access to the child. You can't use the local variable technique if an instance of the parent component class must read or write child component values or must call child component methods. When the parent component class requires that kind of access, inject the child component into the parent as a ViewChild.


Call child component methods and properties using template , To know more about component communication, you can follow their guide at angular.io at https://angular.io/docs/ts/latest/cookbook/component- communication  How to Create Nested Routes with Angular 9 Child Routes? You can create a nested routing by defining child routes using the children property of a route (alongside a path and component properties). You also need to add a nested router-outlet in the HTML template related to the component linked to the parent route (In our case it's the admin route).


angular2, parent calling child method, I need to call child component function from parent component html. something like this: child component: export class childComponent { private value: boolean;   Angular Component is used to present data and delegate data access to a service. Angular Services are a great way to share data among classes. So in the tutorial, we introduce how to create Angular Service and use Observable class of RxJS library for asynchronous operation in Angular Service’s implementation. Related posts: – Angular 6 … Continue reading "Angular 6 Service – with