Is JavaScript validation bad?

Question

It has been long time since we have been validating our forms using JavaScript. I am sure this must be the case with most other developers.

Question:

What if the

Answer 1

Using JavaScript is not wrong. We've been using it since a long time. It is used for applying client-side validations.

Still, we should implement server-side validation so that a bad guy would not be able to break the application.