Refreshing forms in Angular 2

I am attempting to retrieve values from forms using the submit event. However, I am encountering difficulty resetting those forms later on. I am using an id called "myForm" and an onclick function to try and achieve this.

<form (Submit)="addMarker()" id="myForm">
    <div class="row">
        <div class="col">
            <input type="text" [(ngModel)]="lat" name="lat" class="form-control" placeholder="Latitude">
        </div>
        <div class="col">
            <input type="text" [(ngModel)]="lng" name="lng" class="form-control" placeholder="Longitude">
        </div>
        <div class="col-3">
            <button type="submit" class="btn btn-primary" onclick="myFunction()">Add Marker</button>
        </div>
    </div>
</form>

Script:

function myFunction() {
    document.getElementById("myForm").reset();
}

Answer №1

If you're working on your HTML file:

<form (submit)="addMarker(myForm)" id="myForm" #myForm="ngForm"> // <-- Remember to include the "#"
    <div class="row">
        <div class="col">
            <input type="text" [(ngModel)]="lat" name="lat" class="form-control" placeholder="Latitude">
        </div>
        <div class="col">
            <input type="text" [(ngModel)]="lng" name="lng" class="form-control" placeholder="Longitude">
        </div>
        <div class="col-3">
            <button type="submit" class="btn btn-primary">Add Marker</button>
        </div>
    </div>
</form>

In your TypeScript file, make sure you add this at the beginning:

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

To create a function that resets the form, use the following code:

addMarker(form: NgForm) {
    //perform operations and then reset the form
    form.resetForm();
}

Answer №2

With the latest update to Angular 2 Final, a new API has been introduced for cleanly resetting forms:

@Component({...})
class App {

    form: FormGroup;
     ...
    reset() {
       this.form.reset();
   }
}

This streamlined API not only clears form values, but also reverts form field states to ng-pristine and ng-untouched.

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