10 Useful JavaScript Form Validation Libraries

For Internet users, form filling on many websites and mobile applications has become a common exercise to provide information, like email ID, name, product delivery address, etc, in order to use the services. After putting the required information, the form validates the information and allows you to use the services. However, form validation often frustrated many Internet users in the past as any wrong or incomplete information resulted in the page reload, forcing them to enter the whole correct information again.

But, problems don’t last forever in the technology world. That said, I am unveiling 10 useful JavaScript form validation libraries that show instant alert whenever an Internet user enters any wrong information, thereby saving the time of entering the whole information again. These JavaScript form validation libraries check the veracity of the information entered before sending it to the server. As a result, an invalid info dialog instantly appears in front of the info tab in which wrong information was entered, which saves the time and hassles of putting the whole correct information again.

#1. jQuery Validation Plugin

jQuery Validation, an MIT licensed plugin and created by jQuery mega creator Jörn Zaefferer, is one of the most popular choices of JavaScript developers. The plugin is tested with jQuery 1.6.4, 1.7.2, 1.8.3, 1.9.0.

jQuery Validation plugin makes it possible for web developers to address the most important functions and the issues pertinent to form validation. jQuery Validation plugin includes important contents, like errors container, file uploads, dynamics forms, etc. However, as nothing is perfect in this world, jQuery Validation Plugin also has a disadvantage, and that is its jQuery dependency. The plugin has got excellent documentation, which is being used by many developers world over. English is the main language for default error messages, though translation option is available for as many as 37 languages.

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#2. Validate.js

Validate.js also obtains licence from MIT, and is popular among web developers for being lightweight. When gzipped, Validate.js weighs in at around 2kb. Validate.js opens gates to validate JavaScript object in a declarative manner. Since Validate.js is unit tested with 100% code coverage, ÂÂÂÂ developers can use it for production.

Unlike many other validation libraries that are very tightly coupled to a language or framework, Validate.js provides a cross framework and cross language way of validating data. Besides, the library is free of any required external dependencies and offers easy documentation.

#3. Parsley.js

Parsley.js, an MIT licensed JavaScript form validation library, is powerful and easy to use. The library allows automatic detection of form modifications, and adapts the validations accordingly. Parsley is UX focussed and meets your exact requirements by allowing you to override almost every Parsley default behavior. Parsley is strongly tested and ÂÂÂÂ is fit for every browser, including IE8. Using Parsley, you enable your users to get feedback on their form submission before sending it to the server. Parsley also comes with numerous predefined constraints, type constraints and extra validators.

#4. Verify.js

Verify.js, another MIT licensed form validation library, is fully customizable, easily extendable, unobtrusive, and includes grouped validations as well as asynchronous validations. However, before choosing it as a form validation tool, give a thought over its documentation which is currently in progress. There is a note on the top of its documentation, saying, “As this library and corresponding documentation is a work in progress, this API is subject to change.”

#5. GValidator

GValidator is LGPL licensed and is one of the most lightweight javascript form validation libraries. As GValidator is an automatic program, it frees you from the need of using even a single line of written command. Paying heed to high demand of browser applications, developers have made it compatible with most of the operating systems.

The goals behind GValidator development are as follows:

  • A user-friendly experience
  • Code flexibility and extensibility
  • A reusable and lightweight library
  • Promote adoption via ease of use
  • Cross browser compatibility
  • Semantically clean code
  • Standards compliant code

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