Form submission handling in Angular - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to bind the form submission to the handler method.

Angular

<form ([1])="onSubmit()">
  <button type="submit">Submit</button>
</form>

Drag options to blanks, or click blank then click option'

AngSubmit

Bsubmit

Cclick

Dchange

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'click' event on the form tag instead of 'ngSubmit'.

Using 'submit' event which is native but Angular prefers 'ngSubmit'.

The ngSubmit event binds the form submission to the handler method in Angular.

2fill in blank

medium

Complete the code to prevent the default form submission behavior.

Angular

onSubmit(event: Event) {
  event.[1]();
  console.log('Form submitted');
}

Drag options to blanks, or click blank then click option'

AstopPropagation

BdetachEvent

CstopImmediatePropagation

DpreventDefault

Attempts:

3 left

💡 Hint

Common Mistakes

Using stopPropagation which only stops event bubbling.

Using stopImmediatePropagation which is not needed here.

Calling preventDefault() stops the browser from performing the default form submission, allowing Angular to handle it.

3fill in blank

hard

Fix the error in the form control binding to correctly update the model.

Angular

<input type="text" [[1]]="name" (ngModelChange)="name=$event" />

Drag options to blanks, or click blank then click option'

AformControlName

Bvalue

CngModel

DformControl

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'value' which is one-way binding only.

Using 'formControl' or 'formControlName' without importing ReactiveFormsModule.

Using [ngModel] binds the input to the component's property for two-way data binding.

4fill in blank

hard

Fill both blanks to create a reactive form with a control named 'email'.

Angular

this.form = new Form[1]({
  email: new Form[2]('')
});

Drag options to blanks, or click blank then click option'

AGroup

BControl

CArray

DBuilder

Attempts:

3 left

💡 Hint

Common Mistakes

Using FormArray instead of FormGroup for a single form.

Confusing FormBuilder with FormControl.

FormGroup groups controls, and FormControl creates a single control.

5fill in blank

hard

Fill all three blanks to handle form submission and reset the form.

Angular

onSubmit() {
  if (this.form.[1] === 'VALID') {
    console.log(this.form.[2]);
    this.form.[3]();
  }
}

Drag options to blanks, or click blank then click option'

Astatus

Bvalue

Creset

Dcontrols

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'controls' instead of 'status' to check validity.

Trying to reset form by setting value to empty instead of calling reset().

Using status === 'VALID' to check validity, value gets the form data, and reset() clears the form.