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parent.html

<p>parent</p>
<children></children>

parent.ts

sayhello() {
   console.log("hello")
};

children.ts

callHellotoConsole{
   this.sayhello()
}

How can i call sayhello() func from parent component ! I already call like that

  <children [sayhello] = "sayhello()"></children>

children.ts

@Input() sayhello: Function;

I will suggest not trying to invoke the parent method in the child. Consider using an event emitter to communicate to the parent from the child https://angular.io/guide/component-interaction#parent-listens-for-child-event.

Parent Component:

export class ParentComponent implements OnInit {
    .....
    onSayHello() {
        // Execute some code
    }
}

Parent Component Template:

<p>parent</p>
<children (sayHello)="onSayHello()"></children>

Child Component

@Component({
   selector: 'child-component',
   templateUrl: './child-component.component.html',
   styleUrls: ['./child-component.component.scss']
})
export class ChildComponent implements OnInit {
    @Output() sayHello = new EventEmitter();
    .....
    sayHello() {
        this.sayHello.emit(); // you can send any variable to parent
    }
}

When this.sayHello.emit(); is fired, your handler in your parent element (`onSayHello) will be called.

Here is a stackblitz demo

Call a parent component function from a child component in Angular , I will try to give a complete answer to both cases that you may encounter: Case 1: Calling a child function from the parent component. You can� There are several ways to call the function () in parent component from the child component of angular 4 such as input bindings, setters, service, etc. According to my understanding, the easiest way is using the service. In this tutorial, I will share how to communicate parent and child component using router-outlets and services method.


Do not add braces '()' with 'sayHello' while passing it as an input value to the child component.

Try like this:-

Parent.ts

export class ParentComponent implements OnInit {

  constructor() { }

  ngOnInit() {
  }

  sayHello() {
    console.log('Hello');
  }

}

Parent.html

<app-child [sayHello]="sayHello"></app-child>

Child.ts

export class ChildComponent implements OnInit {

  constructor() { }

  @Input()
  sayHello: Function;

  ngOnInit() {
  }

  callHello() {
    this.sayHello();
  }

}

Angular 4 call parent method in a child component, import { Output, EventEmitter } from '@angular/core'; class ChildComponent { @Output() someEvent = new EventEmitter<string>();� Call function from parent angular. Related. Hot Network Questions What is a rigorous, mathematical way to obtain the shortest confidence interval given a confidence


Try like this:

parent.ts

@ViewChild('childRef') child: ChildComponent;


child.sayhello()

.html

<children #childRef></children>

Angular : how to call parent component function from child , use below code to call child component from parent component. <app-child-component></app-child-component> parentFun(){alert(“parent component function.” <app-child-component (parentFun)=”parentFun()” ></app-child-component> @Output(“parentFun”) parentFun: EventEmitter<any> = new EventEmitter(); If you need to execute a function that needs to access parent scope variables you could choose an event approach. Contrary to @Input you can use @Output that is the angular way to communicate events from child to parent.


how-to-call-child-componentss-method-from-the-parent-component , Toggle light/dark theme. Toggle Zen Mode. Project. Download Project. Info. Starter project for Angular apps that exports to the Angular CLI. 20.3k. 95. Files. src. Angular isolate scopes: Calling a parent scope function with externally defined arguments Isolate scopes offer three kinds of variable binding. This function can be used to perform initialization. ABC is parent component and DCE is child component, this child component has Span of Text tag and X symbol. Angular 1.


call-parent-method-from-child-in-angular-6, Toggle light/dark theme. Toggle Zen Mode. Project. Download Project. Info. Starter project for Angular apps that exports to the Angular CLI. 5.9k. 19. Files. src . Component communication is something which you will be required to implement even in the simplest of Angular Application. When it comes to passing data from parent to child component we use property binding. In this case, we send the data from the parent component to the child component using an attribute.


Angular – Call Child Component's Method in Parent Component's , input element, you want to call ChildComponent's doSomething() method. Simply do this: 1. Give app-child selector in parent.component.html� 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.