Property 'dob' does not exist on type 'EmpAddEditComponent'

Hi

  I want that Dob should be greater than doj . and minimum difference between the two should be 1 year.

ON below line i am getting error - Property 'dob' does not exist on type 'EmpAddEditComponent'

 
    

        

            
                Choose a date
                
                MM/DD/YYYY
                
                
            
            
                Choose a date
                
                MM/DD/YYYY
                
                

            
        
    
    

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---------------TYPESCRIPT
export class EmpAddEditComponent implements OnInit {

  empForm : FormGroup;
  constructor(private _fb : FormBuilder){
    this.empForm = this._fb.group({
      dob:'',
      doj:'',
    })
  }
}

*************** DIRECTIVE  
import { Directive, Input, forwardRef } from '@angular/core';
import { NG_VALIDATORS, Validator, AbstractControl, ValidationErrors } from '@angular/forms'; 

@Directive({
  selector: '[appDateRangeValidator]',
  standalone: true,
  providers: [{ provide: NG_VALIDATORS, useExisting: DateRangeValidatorDirective, multi: true }]
})

export class DateRangeValidatorDirective implements Validator {
  @Input('appDateCompare') compareDate: Date;

  validate(control: AbstractControl): ValidationErrors | null {
    const currentDate = new Date(control.value);
    if (this.compareDate && currentDate) {
      if (currentDate < this.compareDate) {
        return { 'dateCompare': true }; // Validation failed
      }
    }
    return null; // Validation passed
  }
}