Create FormBuilder and Validators for the Register Page
Explore how to implement FormBuilder and Validators in Angular to build a functional registration form. Understand importing ReactiveFormsModule, setting form controls with validation rules, and configuring template directives to provide real-time feedback and disable submission until input is valid.
Creating FormBuilder for the register component
So far in this course, we’ve designed the registration form, but we’re yet to configure FormBuilder and validation. To implement this, we’ll follow the steps below:
Step 1: Import and inject the ReactiveFormsModule
The FormBuilder API uses ReactiveFormsModule and can’t work without it. To set up ReactiveFormsModule, we must import and inject it into our app.module.ts file.
{
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=827846
"recommendations": ["angular.ng-template"]
}
As we can see above, we import the ReactiveFormsModule in line 5 and inject it into the imports array in line 27.
Step 2: Setting up the FormBuilder, FormGroup, and Validators
The FormBuilder class is used to create FormGroups, FormControls, and Validators. It provides the required API needed to make the instance of a form in Angular. To configure the FormGroups, FormControls ...