There are scenarios where we don't need to go to the server to validate the input data. In the preceding example of server-side validation, we do not need to go to the server to verify whether the user has entered the data for the Name field. We can validate at the client side itself. This prevents round-trips to the server and reduces the server load.
We are going to use JavaScript to validate the data from the client side. JavaScript is a high-level, interpreted language that is primarily used in client-side programming.
At present, JavaScript is also being used at the server side as part of Node.js.