Once these two libraries are included on your page, you are free to leverage their functionality and start validating your form data. It requires the import of the standard JQuery library, and subsequently the JQuery Validation library. Getting started with the JQuery Validation plugin is a fairly simple process. So the best case scenario would be for the developer to provide client-side validation for a quicker and more intuitive user experience, while also including server-side validation as a second line of defense should the client-side validation be incomplete or surpassed entirely. This could result in the application crashing or invalid data being saved to your database. If there is no server-side validation present, this invalid data will attempt to save to your database. Imagine the scenario where a user disables JavaScript in their browser and then enters invalid input to pass on to the server. It should be noted that including client-side validation doesn’t mean that server-side validation should be ignored. The form data is validated in the browser, ensuring that only valid data is passed on to the server. Client-side validation is faster as it doesn’t require a trip to the server. Another advantage of including client-side validation for forms in your web application is, simply put, the benefit of speed. If a form field is indicated as required and the user begins to provide a value, then the error will disappear, indicating to the user that they have provided valid data without needing another form submission. With the use of the JQuery Validation plugin, once the initial submission of the form has occurred, the validation will respond to user input immediately. This means a better and more intuitive user experience. Client-side validation, however, does not. Server-side validation requires a round trip to the server to provide the user with information regarding the validity of their input. But, if we already have server-side validation, why worry about also including client-side validation? There are a few key benefits to using client-side validation to bolster your web application. It’s easy to understand why we need form validation on the server side (and just form validation in general) as it prevents users from saving incomplete forms or invalid form data that could cause issues for the applications that use this form data after it has been saved. In this post, I will discuss the usefulness of client-side validation and show you how to get started with JQuery Validation. The JQuery Validation plugin is an easy-to-use framework for form validation. This validation comes in two types: server-side validation and client-side validation. For a developer, an integral part of adding a form to an application is providing sufficient form validation to both preserve data integrity and protect your server from potentially malicious user input. Forms for collecting information from users via a form can be found everywhere on the internet.
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