app.component.ts

import { Component } from '@angular/core';
import { FormControl, FormGroup, FormBuilder, FormGroupDirective, NgForm, Validators } from '@angular/forms';
import { AuthService } from './auth.service';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent {
  title = 'myProject';
  myForm: FormGroup;

  constructor(
    private formBuilder: FormBuilder,
    private authService: AuthService
  ) {
    this.myForm = this.formBuilder.group({
      name: ['', Validators.required],
      reCAPTACH: ['', Validators.required]
     });
  }

  // function to resolve the reCaptcha and retrieve a token
  resolved(captchaResponse: string) {
    console.log(`Resolved response token: ${captchaResponse}`);
    this.sendTokenToBackend(captchaResponse);
  }
// function to send the token to the node server
sendTokenToBackend(tok) {
    // calling the service and passing the token to the service
    this.authService.sendToken(tok).subscribe(
      result => {
        console.log(result.success);
      },
      err => {
        console.log(err);
      }
    );
  }
}