How to pass reactive form data between child to parent components with out using services

Question

We would like to consume child reactive form data from parent when we click on parent button. Currently we are using viewchild for getting the child cpomponent reference. We

Answer 1

Wrap your child form Inside form element so that you can submit your child form from parent, Then Inject FormGroupDirective in child component to get ref of parent form

<form (ngSubmit)="save()" [formGroup]="detailsForm"> 
    <app-child></app-child>
    <button type="button">Save</button>
 </form>

Then use controlContainer to provide the existing FormGroupDirective in child component

childcomponent.ts

  form;
  constructor(private fb: FormBuilder, @Host() private parentFor: FormGroupDirective) { }

  ngOnInit() {
    this.form = this.parentFor.form;
    //Add FormControl as per your need
    this.form.addControl('child', this.fb.group({
      name: "",
      email: ""
    }))

  }

child.component.html

<form formGroupName="child">
  <input formControlName="name">
  <input formControlName="email">
</form>

Example:https://stackblitz.com/edit/angular-xusdev

Answer 2

If use a "referenceVariable" you has access to all the public variables and function of the "child"

<button (click)="click(mychild)"></button>
<child #mychild></child>

click(mychild.any)
{
   console.log(mychild.detailsForm);
}

Anyway, I think you want a child that belong to a Form. For this you can use viewProviders in child

viewProviders: [
    {
      provide: ControlContainer,
      useExisting: FormGroupDirective
    }
  ]

As this link show