ionic input

                                    // In child.ts

import {Output, EventEmitter} from '@angular/core';
export class ChildComponent {
  ...
  @Output() typeChanged = new EventEmitter<string>();
  type = "got";

  emit() {
    this.typeChanged.emit(this.type);
  }
}
// parent.html

<div>
    <component (typeChanged)="onTypeEmitted($event)"></component>
<div>

// In parent.ts

export class ParentComponent {
  ...
  onTypeEmitted(type: string) {
    // do something with 'type'
  }
}

                                    <!-- Inputs with labels -->
<ion-item>
  <ion-label>Default Label</ion-label>
  <ion-input></ion-input>
</ion-item>

<ion-item>
  <ion-label position="floating">Floating Label</ion-label>
  <ion-input></ion-input>
</ion-item>

<ion-item>
  <ion-label position="fixed">Fixed Label</ion-label>
  <ion-input></ion-input>
</ion-item>

<ion-item>
  <ion-label position="stacked">Stacked Label</ion-label>
  <ion-input></ion-input>
</ion-item>

                                    // in component.ts
this.myForm = formBuilder.group({
    firstName: ['value'],
    lastName: ['value', *validation function goes here*],
    age: ['value', *validation function goes here*, *asynchronous validation function goes here*]
});

...

// in component.html
<form [formGroup]="myForm">
    <ion-input formControlName="firstName" type="text"></ion-input>
    <ion-input formControlName="lastName" type="text"></ion-input>
    <ion-input formControlName="age" type="number"></ion-input>
</form>