A lightweight JavaScript form validation library inspired by CodeIgniter, with no dependencies.
validate.js is a lightweight JavaScript library for client-side form validation, inspired by the CodeIgniter PHP framework. It allows developers to validate form fields against a variety of rules without any external dependencies. The library solves the problem of ensuring data integrity in web forms before submission, reducing server-side validation overhead.
Frontend developers and web designers who need a simple, dependency-free solution for client-side form validation in their projects.
Developers choose validate.js for its minimal footprint, ease of use, and flexibility—it offers a familiar API for those coming from CodeIgniter, supports custom rules, and works across all major browsers including legacy ones.
Lightweight JavaScript form validation library inspired by CodeIgniter.
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Works standalone without requiring external libraries, minimizing bundle size and simplifying setup, as explicitly stated in the README.
Functions in all major browsers including IE6, making it ideal for projects that must support older browsers, a key feature highlighted in the documentation.
Provides over a dozen built-in rules and allows custom validation callbacks, offering flexibility for various use cases, as mentioned in the features list.
The API is modeled after CodeIgniter's form validation, easing adoption for developers familiar with that PHP framework, as noted in the README.
The README directs users to an external site (http://rickharrison.github.com/validate.js) for full documentation, which may be broken or not updated, indicating poor maintenance and accessibility issues.
Validation rules are defined using arrays of objects, which can become cumbersome and less intuitive for complex forms compared to modern declarative approaches like Yup or Joi.
Lacks support for contemporary validation needs such as async validation, schema-based validation, or built-in integration with frontend frameworks, as evident from its simple, synchronous rule system.
jQuery Validation Plugin library sources