Data validations performed at client side

Question

Why the data validations should be performed at a client side?

Answer 1

Data validations should be performed at a client side. The server-side validation is avoided since it makes server task overloaded. If a client-side validation is not accessible, then we can use server-side validation. When the user sends the request to a server, a validation controls are invoked to check a user input one by one.