import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { ReactiveFormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    ReactiveFormsModule,
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

import { Component } from '@angular/core';
import { FormGroup, FormBuilder, Validators } from '@angular/forms';
import { NG2Validators } from 'angular2-validators';
@Component({
  selector: 'app-root',
  template: `
      <form [formGroup]="theForm" novalidate>
          <label for="name">Email</label>
          <input type="text" class="form-control" name="email" formControlName="email">
      </form>
  `,
})
export class AppComponent {
  theForm: FormGroup;
  constructor(private fb: FormBuilder) {
    this.theForm = fb.group({
      email: ['', [Validators.required, NG2Validators.isEmail]]
    });
  }
}