====== Template Driven Form ======
In order to use ngForm, we need to import the Form module ni app.module.ts and your component.
===== component.html =====
When the submit button is clicked, we have the form to call function ''logForm(form.value)''.
<code>
<form #form="ngForm" (ngSubmit)="logForm(form.value)">
  <label>Firstname:</label>
  <input type="text" name="firstName" ngModel>
  <br>
  <label>Lastname:</label>
  <input type="text" name="lastName" ngModel>
  <br>
  <button type="submit">Submit</button>
</form>
</code>

==== component.ts ====
<code>
import { Component, OnInit } from '@angular/core';
import {Form} from "@angular/forms";

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

  constructor() { }

  ngOnInit() {
  }

  logForm(value: Form) {
    console.log(value);

  }
}
</code>

==== Output ====
The following output will print in the console.
<code>
Object { firstName: "first name", lastName: "last name" }
</code>

==== Additional Info ====
Item can be grouped by ngModelGroup, such as:
<code>
<form #form="ngForm" (ngSubmit)="logForm(form.value)">
  <label>Firstname:</label>
  <input type="text" name="firstName" ngModel>
  <br>
  <label>Lastname:</label>
  <input type="text" name="lastName" ngModel>
  <br>
  <fieldset ngModelGroup="personalInfo">
    <label>phone:</label>
    <input type="text" name="phone" ngModel>
    <br>
    <label>Address:</label>
    <input type="text" name="address" ngModel>
  </fieldset>
  <button type="submit">Submit</button>
</form>
​</code>

The result would look like the following on click.
<code>
firstName: "first "
​lastName: "last"
​personalInfo: {…}
​​   address: "my addess, HK"
   ​​phone: "123456789"
</code>