JSON form validator in javascript fully customisable

A form validation that uses Javascipt to leverage the Browser-Native Constraint Validation API to customize form validation behaviour.

A simple and versatile (Form) Data validation framework based on Rules for PHP, JavaScript, Python

JSON Schema extension for arithmetic and relational constraints between properties.

🗳React form validation using the validation native to all recent browsers. Also includes support for handling API validation messages, success messages, memoized and nested form state, and super easy styling.

Functional reactive forms. Multi-layer validation, custom styling, field grouping, reactive props, and much more.