ForgJs – A lightweight object validator (github.com)

Very nice API. I do have a question, and not to be dismissive, but is there a strong reason to use Forg over Validatejs. The APIs are pretty similar so I don't know what I would choose Forg over ValidateJS.

Some things to address:

* Typescript definitions

* ES/6 import documentation

* There are a lot of tiny typos in the readme, it would make sense to spell check that.

Thanks for the contribution.

Very cool idea. Something I would enjoy using is a shorthand syntax for validation rule object declarations eg:

new Validator = ({ age: 'int 22-48' });

If memory serves you can parse that type of string in the Validator constructor and insert the Rule structures you already have in place of it.

With two mature packages doing the same: Joi & ajv. What made you write this?

https://www.npmjs.com/package/joi

https://www.npmjs.com/package/ajv

This is very cool, but I highly recommend using a standard like JSON schema instead. It will make your life easier long term. The initial hurdle of learning may be harder, but lots of libraries/languages support JSON schema.

If you are using typescript, I highly recommend using a generator to create JSON schema definitions. This one has worked really well recently https://github.com/YousefED/typescript-json-schema

Out of curiosity, why have a singular Rule class that has a type (with internal branching logic based on that field), rather than separate Rule classes for each type of Rule, with Rule being a base class that users can extend to define their own rules?

anything like this for Python?

Any attributes for required/optional fields?

I've found https://github.com/ianstormtaylor/superstruct to be really flexible/powerful.