In the old days the user would submit the form, the validation would happen on the server, then return a result. If the result was a failure, you would render

In the old days the user would submit the form, the validation would happen on the server, then return a result. If the result was a failure, you would render the errors on a new page load. If the result was a success, you could redirect the user to "confirmation" page or reload the same page but with a different output.