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Html5_validators

A gem/plugin for Rails 3, Rails 4, Rails 5, and Rails 6 that enables client-side validation using ActiveModel + HTML5 Form Validation

Html5_validators

A gem/plugin for Rails 3, Rails 4, Rails 5, and Rails 6 that enables client-side validation using ActiveModel + HTML5 Form Validation

Author Avatar Theme by amatsuda
Github Stars Github Stars: 302
Last Commit Last Commit: Apr 29, 2025 -
First Commit Created: Aug 27, 2024 -
Html5_validators screenshot

Overview

HTML5Validators is an innovative gem designed for Rails 3+ that enhances user experience by enabling automatic client-side validation through ActiveModel and HTML5 features. By integrating this gem into your application, it automatically transforms your model validation rules into HTML5 validation attributes for forms, streamlining the input process and improving overall data integrity. This can be especially beneficial in ensuring that users are guided correctly when filling out forms, without the need for extensive backend validation.

The gem not only simplifies the validation process but also provides flexibility in its usage. Developers can customize validations on a per-form or per-model basis, offering a tailored approach to handling form submissions. As applications evolve, this functionality will help maintain a seamless developer experience while improving user interactions.

Features

  • Automatic HTML5 Validations: Translates ActiveModel validations into HTML5 attributes for forms, enhancing client-side validation.
  • Presence Validator: Ensures required fields are filled out by automatically applying the ‘required’ attribute to various form inputs.
  • Length Validator: Implements maximum length restrictions on text fields using the ‘maxlength’ attribute for effective user input control.
  • Numericality Validation: Supports numeric range validation by utilizing ‘max’ and ‘min’ attributes, essential for number-only inputs.
  • Configuration Flexibility: Easily disable automatic HTML5 validation on a per-form or per-model basis, adapting to specific application needs.
  • Broad Compatibility: Supports multiple Ruby and Rails versions as well as HTML5 compatible browsers, ensuring wide usability and integration.
  • Easy Installation: Quick setup with a simple addition to your Gemfile, making it accessible for developers to implement.
  • Legacy Browser Handling: Automatically ignores validation attributes in HTML5 incompatible legacy browsers, ensuring a consistent user experience.