form-item-control.service.ts update

@Injectable()export class FormItemControlService {  constructor(private formBuilder: FormBuilder) {  }  toFormGroup(formItems: FormItemBase
     
      []) {    const group: any = {};    formItems.forEach(formItem => {      group[formItem.key] = formItem.required        ? [formItem.value || '', Validators.required]        : [formItem.value || ''];    });    return this.formBuilder.group(group);  }}
     

dynamic-form.component update

     
  
      {
   {formItem.label}}  
      
    
           
             {
   {opt.value}}        
       
      
              
        {
   {opt.value}}    
       
    
       
      
              
        {
   {opt.value}}    
       
  
      
  
        
      
           {
    {formItem.label}} is required