angular - How to apply form validation without <form> tag in Angular2 -

i wondering if there way validate form in angular 2 without using form tag? example below want make required field

<div class="form-group">     <label for="name">name</label>     <input type="text" class="form-control" id="name"> </div> <button type="button" class="btn btn-default" (click)="save()">save</button> 

form controls can standalone (without parent form), whether using declarative form controls or reactive form controls.

for declarative (using ngmodel) can like

<input #model="ngmodel" [(ngmodel)]="value" type="text" required/> <div *ngif="model.invalid" style="color: red">required</div> 

for reactive forms can like

<input [formcontrol]="control" [(ngmodel)]="value" type="text"/> <div *ngif="control.invalid" style="color: red">required</div>  // in component this.control = new formcontrol('', [validators.required]); 

see plunker

for more information on using angular forms in general, see the docs/tutorial