How can I create custom fields in Angular using ngx-formly?

How can I create custom fields in Angular using ngx-formly?

You can create custom fields in Angular using ngx-formly by defining a custom field type and registering it.

Can you show me an example of a custom field?

Sure! Here's a simple example of a custom input field:

import { Component } from '@angular/core';
import { FieldType } from '@ngx-formly/core';

@Component({
  selector: 'formly-field-custom',
  template: `<input [formControl]='formControl' [formlyAttributes]='field' />`
})
export class CustomFieldType extends FieldType {}

How do I register this custom field type?

You can register the custom field type in your module like this:

import { FormlyModule } from '@ngx-formly/core';
import { CustomFieldType } from './custom-field-type';

@NgModule({
  imports: [
    FormlyModule.forRoot({
      types: [{ name: 'custom', component: CustomFieldType }]
    })
  ]
})
export class AppModule {}

What if I want to add validation to this custom field?

You can add validation by implementing the validators property in your custom field type. For example:

validators: {
  validation: [
    { name: 'required', options: { message: 'This field is required' } }
  ]
}