Fazendo Submit

Da mesma forma que nos exemplos para o template driven, e possivel realizar o submit do formulario atravez da diretiva ngSubmit

<!--adicionado a diretiva ngSubmit-->
<form class="form-horizontal" [formGroup]="formulario" (ngSubmit)="onSubmit()">
  <div class="form-group">
    <div class="col-sm-12">
      <label for="nome">Nome</label>
      <input type="text" class="form-control" id="nome" placeholder="Insira o nome"
        formControlName="nome" required/>
    </div>
    <div class="col-sm-12">
      <label for="email">E-mail</label>
      <input type="email" class="form-control" id="email" placeholder="Insira o e-mail"
        formControlName="email" required email/>
    </div>
  </div>
  <button type="submit" class="btn btn-primary">Submit</button>
</form>
<app-form-debug [formulario]="formulario"></app-form-debug>

import { HttpClient } from '@angular/common/http';
import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormGroup } from '@angular/forms';

@Component({
  selector: 'app-data-driven-form',
  templateUrl: './data-driven-form.component.html',
  styleUrls: ['./data-driven-form.component.css']
})
export class DataDrivenFormComponent implements OnInit {

  public formulario: FormGroup

  constructor(private formBuilder: FormBuilder, private http: HttpClient) { }

  ngOnInit(): void {
    this.formulario = this.formBuilder.group({
      nome: [null],
      email: [null]
    })
  }

  public onSubmit(): void {
    console.log(this.formulario);
    console.log(this.formulario.value);
    this.http.post('enderecoServidor/formUsuario', JSON.stringify(this.formulario.value))
      .subscribe(response => console.log(response))
  }
}