todo-form.component.ts

import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormGroup, Validators } from '@angular/forms';
import { NgbActiveModal } from '@ng-bootstrap/ng-bootstrap';

@Component({
  selector: 'app-todo-form',
  templateUrl: './todo-form.component.html',
  styleUrls: ['./todo-form.component.css']
})
export class TodoFormComponent implements OnInit {
  todoForm: FormGroup;

  constructor(private formBuilder: FormBuilder,
   public activeModal: NgbActiveModal) { }

  ngOnInit() {
    this.todoForm = this.formBuilder.group({
      title: ['', Validators.required],
      description: ['', Validators.required],
      done: false
    });
  }
}