Submitting a form in Angular 2 triggers a page refresh

I'm currently using an Angular2 template to build a form.

Whenever I click on the button, the page refreshes.

Fortunately, my validations are functioning properly.

Is there any way to prevent the page from refreshing when the user clicks the button?

Below is the HTML code snippet that I am working with:

<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>

Answer №1

Ensure that you have included FormsModule from @angular/forms in the module where your component is located. If this step is missed, your form submission may cause the page to refresh continuously without displaying any errors or messages in the console.

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

/*Remember to include it at this point*/
import { FormsModule }        from '@angular/forms';

 @NgModule({
  /*Don't forget to add it to the imports array here as well*/
  imports:      [ FormsModule,  CommonModule],
  declarations: [ YourFormComponent ],
  exports:      [],
  providers:    [],
})

export class FeatureModule{ }

Answer №2

Refreshing occurs due to an error in the onSubmit handler. To prevent this, add event.PreventDefault(); within the onSubmit:

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


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

You may also debug the error by checking the console output and ensuring that the preserve log option is enabled.

https://i.sstatic.net/pqTOP.png

Answer №3

Consider using this instead:

<input type="button"

The page reload happens due to the automatic submission behavior of the browser.

Answer №4

Latest Update for 2019/2018 - Experiencing issues on a recent version of Angular (currently on 7)? It's not because of <button type="submit"...>; that's completely okay to use. Keep your (submit) event on the <form> element too.
The problem likely lies elsewhere causing Angular not to behave as expected.

  • Make sure to include either FormsModule or ReactiveFormsModule if you're working with reactive forms.
  • Check the console for any errors (press f12 and go to Console)

If your Form is properly set up, Angular should not refresh the page unnecessarily.

Answer №5

The solution worked flawlessly and effectively prevented the entire page from reloading:

  1. By modifying the button type attribute from "submit" to "button"
  2. Additionally, I included a (click)= submitValues() within the button properties as shown below :

    submit

Implementing these changes successfully prevented the page from reloading. I trust this information proves useful.

Answer №6

Fixing page refresh issue in Angular 2 forms:

To prevent the page from refreshing, change the button type from "submit" to button.

Solution:

Make sure to import the form module in your corresponding module. Without the form module, a <form> tag is considered as an html form which triggers a page refresh.

<form (submit)="onSubmit()">
   <input type="text" name="firstName"/>
   <button type="submit">submit</button>
</form>

A button with type set to submit will trigger the form's onsubmit() function, causing a page refresh.

Answer №7

Make sure to include the FormsModule in your "app.module.ts" file, just like this:

import { FormsModule } from '@angular/forms';

@NgModule({
  imports:[ FormsModule ]

Regarding the (click) action on the button, there seems to be a problem where multiple clicks by a user result in multiple submissions to both the API and the Database. To prevent this issue, it is recommended to use the (ngSubmit) action on the form element so that submission only occurs after the form validation is successfully completed.

Answer №8

Dealing with the identical problem, my reactive form was causing the page to reload when submitted.
I discovered that I mistakenly used '=' to assign a value to my reactive form control.
By switching to using setValue(), I was able to fix the issue:

this.formName.controls.fieldName.setValue(value);

Answer №9

I encountered a similar issue when I forgot to declare the page in the module file. Once I added the page declaration to the module, the problem was resolved.

import { FormsModule, ReactiveFormsModule } from '@angular/forms';

import { SignupPage } from './signupPage';

@NgModule({
  imports: [
    CommonModule,
    FormsModule,
    ReactiveFormsModule
  ],
 declarations: [SignupPage]

Answer №10

A user invoking the onSubmit function from an ngSubmit event handler:

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

public onSubmit(event: Event) {
  .... add your custom code here
}

Answer №11

I managed to tackle this issue by utilizing

<button type="button">Submit</button>

in place of

<button type="submit">Submit</button>

The use of the "submit" keyword caused the page to refresh unnecessarily.

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