If you want to apply conditional validation on 'QA Website Url' or 'Customer Website Url', then you need to add 'Admin Website Url' input as 'https://google.co.in'
{{userForm.controls?.adminWebsiteUrl?.errors?.url.message}}
Enter 'https://google.co.in' in Admin Website Url textbox above for apply validation
Conditional Expression with type 'string'
{{userForm.controls?.customerWebsiteUrl?.errors?.url.message}}
Shows Custom Validation Message.
{{userForm.controls?.maintenanceWebSiteUrl?.errors?.url.message}}