Based on selection of file type conditional validation is applied
{{userinfoForm.controls?.fileType?.errors?.file.message}}
This field allow upto 5 files.
{{userinfoForm.controls?.totalImageFiles?.errors?.file.message}}
This field allow minmum 5 files.
{{userinfoForm.controls?.totalDocumentFiles?.errors?.file.message}}
If you want to apply conditional validation on 'MinimumFiles' then you need to add 'File Type' input as 'Picture'. we can add minimum 5 files
{{userinfoForm.controls?.minimumFiles?.errors?.file.message}}
It shows custom message
{{userinfoForm.controls?.minMaxFiles?.errors?.file.message}}