Angular form control and form group скачать в хорошем качестве

Angular form control and form group

In this video we will discuss FormControl and FormGroup classes Text version of the video http://csharp-video-tutorials.blogspo... Healthy diet is very important for both body and mind. We want to inspire you to cook and eat healthy. If you like Aarvi Kitchen recipes, please support by sharing, subscribing and liking.    / @aarvikitchen5572   Slides http://csharp-video-tutorials.blogspo... Angular 6 Tutorial    • Angular 6 tutorial for beginners   Angular 6 Tutorial Text Articles & Slides http://csharp-video-tutorials.blogspo... Angular, JavaScript, jQuery, Dot Net & SQL Playlists https://www.youtube.com/user/kudvenka... When working with reactive forms we create instances of FormControl and FormGroup classes to create a form model. To bind an HTML form tag in the template to the FromGroup instance in the component class, we use formGroup directive To bind an HTML input element in the template to the FormControl instance in the component class, we use formControlName directive formGroup and formControlName directives are provided by the ReactiveFormsModule Both FormControl and FormGroup classes inherit from AbstractControl base class The AbstractControl class has properties that help us track both FormControl and FormGroup value and state The following are some of the useful properties provided by the AbstractControl class value errors valid invalid dirty pristine touched untouched FormControl instance tracks the value and state of the individual html element it is associated with FormGroup instance tracks the value and state of all the form controls in it's group To see the form model we created using FormGroup and FormControl classes, log the employeeForm to the console. onSubmit(): void { console.log(this.employeeForm); } To access a FormControl in a FormGroup, we can use one of the following 2 ways. employeeForm.controls.fullName.value employeeForm.get('fullName').value Note: This same code works, both in the template and component class. In addition to these properties, AbstractControl also provides the following methods. In our upcoming videos we will use these properties and methods for form validation and working with data. setValidators() clearValidators() updateValueAndValidity() setValue() patchValue() Reset()