Start date must be less than End date
Start is required

FormGroup : {{dateRange && dateRange.value | json }}

FormGroup valid : {{dateRange && dateRange.valid }}

FormGroup status : {{dateRange && dateRange.errors | json }}

FormGroup start status : {{dateRange && dateRange.controls.startDate && dateRange.controls.startDate.errors | json }}

FormGroup end status: {{dateRange && dateRange.controls.endDate.errors | json }}