jQuery Form Validation Tutorial: Simple Example with jQuery Validation Plugin | SitePoint
Briefly

First, include the jQuery library in your HTML code snippet to set up basic form input validation with the jQuery plugin. You can download it from the official website, use a package manager like Bower or npm, or use a CDN.
Remember that client-side validation doesn't replace server-side validation, as a malicious user can still manipulate or bypass the validation rules.
Explore advanced techniques, such as custom validation methods, real-time validation, and remote validation for server-side checks.
Overall, the jQuery plugin approach offers several advantages: Built-in validation methods, automatic error handling, consistent behaviour across forms.
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