Isomorphic-validation

Isomorphic-validation is a Javascript library that was designed to run the same validation logic on both client and server sides and reuse it across different forms with the same fields without code repetition. It allows to maintain one source of truth for validators and error messages. On the client side, you can easily connect UI effects to validity states which allows to write straightforward and seemingly linear code having all asynchronicity and conditionals abstracted away. It can be used in conjunction with i18n libraries, UI and icon libraries and other libraries which provide validators.