Using Other Components

Components depend on other components, directives and pipes. For example, TodoListComponent relies on TodoItemComponent. To let a component know about these dependencies we group them into a module.
import {NgModule} from '@angular/core';
import {TodoListComponent} from './components/todo-list.component';
import {TodoItemComponent} from './components/todo-item.component';
import {TodoInputComponent} from './components/todo-input.component';
imports: [ ... ],
declarations: [
bootstrap: [ ... ]
export class ToDoAppModule {
The property declarations expects an array of components, directives and pipes that are part of the module.
Please see the Modules section for more info about NgModule.