Angular-2+ login reactive form example

<form [formGroup]="loginForm" (ngSubmit)="onSubmit()" novalidate>
		Email:
    <input type="text" formControlName="email"/>

    <span *ngIf="loginForm.controls.email.touched && loginForm.controls.email.errors?.required">
      Please enter email address.!
    </span>

    <span *ngIf="loginForm.controls.email.touched && loginForm.controls.email.errors?.email">
      Email address not well formed.!
    </span>
    <br>
    Password:
    <input type="text" formControlName="password"/>
    <br>
  <input type="submit" [disabled]="!loginForm.valid"/>
</form>

import { Component } from '@angular/core';
import { FormBuilder, FormGroup, FormControl, Validators, FormArray } from '@angular/forms';

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent  {
  loginForm: FormGroup;
  constructor() {
    this.loginForm = new FormGroup({
      email: new FormControl('', [Validators.required, Validators.email]),
      password: new FormControl('', [Validators.required])
    });
  }

  onSubmit() {
    if(this.loginForm.valid) {
      console.log(this._v());
    }
  }
  _v() {
    return this.loginForm.value;
  }
}