Validating an HTML form is NOT a simple task as you develop a modern web app.
But it is NOT enough.
For better user experience, custom styles, error messages and validation rules must be taken into account.
Originally Published Jan 27 2018, updated Jan 22 2020
Table of contents:
Best jQuery Form Validation Plugins:
Parsley.js is a powerful, feature-rich jQuery form validation plugin which can be used to dynamically validate form fields on client side before submitting.
Validation Engine is a jQuery plugin aimed at the validation of form fields in the browser. The plugin provides visually appealing prompts that grab user attention on the subject matter.
validate.js is a lightweight client-side form validation plugin for jQuery that allows to validate and mask form fields using HTML5 data attributes and/or regular expressions.
A lightweight and simple to use Bootstrap 4 validator that validates commonly used form field and display custom validation errors in an HTML form. Works with native HTML5 form attributes.
Vanilla JS Form Validation Plugins:
A fast, cross-browser, user-friendly, highly customizable form validator that works with the native HTML5 input types: text, email, url, date, etc.