ngSubmit refreshes the page in Angular 2 form

I am using Angular2 template for creating a form.

When i click on button, the pages refreshes.

My validations are working fine.

How can i stop page refresh when user clicks on button?

Following is HTML I am using:-

<div class="panel panel-default">
    <div class="panel-heading">
        <h3 class="panel-title">Add Employee</h3>
        {{model | json}}
        {{EName.errors | json}}
    </div>
    <div class="panel-body">  
        <form (ngSubmit)="onSubmit(empForm)" #empForm="ngForm" autocomplete="off" novalidate>

        <div class="form-group">
            <label for="EmployeeName">Employee Name</label>
            <input type="text" class="form-control" id="EmployeeName" placeholder="Employee Name" required [(ngModel)]="model.EName" name="EName" #EName="ngModel" ngControl="Ename" #EName="EName" >
            <div *ngIf="EName.touched && EName.errors" >
                <div *ngIf="EName.errors.required"  class="alert alert-danger">
                    Employee Name is required
                </div>
            </div>
        </div>
        <div class="form-group">
            <label for="Age">Age</label>
            <input type="text" class="form-control" id="Age" name="Age" placeholder="Age" [(ngModel)]="model.Age" ngControl="Age">
        </div>
        <div class="form-group">            
            <label for="Sex">Sex</label>
            <div class="d-block">
                <label class="radio-inline">
                    <input type="radio" name="sex" id="Male" value="0" (click)="model.Sex=$event.target.value"> Male
                </label>
                <label class="radio-inline">
                    <input type="radio" name="sex" id="Female" value="1" (click)="model.Sex=$event.target.value"> Female
                </label>
            </div>
        </div>

        <div class="form-group">
            <label for="DOJ">Date of Joining</label>
            <datepicker [(ngModel)]="model.DOJ" name="DOJ"></datepicker>
        </div>

        <div class="form-group">
            <label for="Salary">Salary</label>
            <input type="text" class="form-control" id="Salary" placeholder="Salary" [(ngModel)]="model.Salary" name="Salary">
        </div>

        <div class="form-group">
            <label for="Designation">Designation</label>
            <select id="Designation" name="designation" class="form-control" required [(ngModel)]="model.Designation" name="designation" #desig="ngForm" ngControl="Designation">
                <option value="" selected>-- Select  --</option>
                <option *ngFor="let designation of designations" value="{{ designation.id }}"> 
                    {{designation.name}} 
                </option>
            </select>
            <div [hidden]="desig.valid || desig.pristine" class="alert alert-danger">
                Please select a proper designation.
            </div>
        </div>
        <button type="submit" class="btn btn-default" [disabled] ="!empForm.form.valid">Submit</button>
        </form>
    </div>
</div>

Solution 1:

Make sure you import FormsModule from @angular/forms in the module containing your component because without it your form on submit will keep refreshing the page and failing silently without logging anything to the console.

import { NgModule }           from '@angular/core';
import { CommonModule }       from '@angular/common';

/*make sure you import it here*/
import { FormsModule }        from '@angular/forms';

 @NgModule({
  /*and add it to the imports array here*/
  imports:      [ FormsModule,  CommonModule],
  declarations: [ YourFormComponent ],
  exports:      [],
  providers:    [],
})

export class FeatureModule{ }

Solution 2:

it refreshes because there is an error in onSubmit handler.. use event.PreventDefault(); in the onSubmit :

 <form (ngSubmit)="onSubmit(empForm, $event)" ... >


public onSubmit(empForm: any, event: Event) {
  event.preventDefault();
  .... rest of your code
}

also you can just check the console output to debug the error ... make sure to mark the preserve log option

Solution 3:

Use instead:

<button type="button"

The reload is caused by the default submit behavior of the browser.

Solution 4:

This worked and stopped the whole page from reloading:

1. I changed the button type from "submit" to "button"

2. I introduced a (click)= submitValues() inside the button props like this :

   submit

This stopped the page from reloading, I hope this helps.