How can I access from a child component to another child component in Angular 4

Question

I have a parent component and inside there are 2 different child components. I need to call the second child component's function from the first child component when I click a link in the first child component.

So here is a basic diagram to explain better:

Answer 1

You could archieve this by means of ViewChild and Output

For example:

@Component({
  template: `
     <child-one (clicked)="handleClick()"></child-one>
     <child-two></child-two>
  `
})
export class ParentComponent {
   @ViewChild(ChildOneComponent)
   childOne: ChildOneComponent;

   handleClick(){
    this.childOne.doSomething();
   }
}

In this case:

• clicked is an Ouput property of ChildOneComponent
• doSomething is a public method

Another approach only ussing Output and a template variable

@Component({
  template: `
     <child-one (clicked)="childTwo.doSomething()"></child-one>
     <child-two #childTwo></child-two>
  `
})
export class ParentComponent {
   
}