@hornbeck/validators

Validator functions for usage in form.

npm install --save @hornbeck/validators

Documentation

All the functions are automatically curried and should be easy to use for any usecase.

This is to allow for variable amount of prefilling of values. All of the functions can be called in any of the follow ways.

import { max } from "@hornbeck/validators";

const max12 = max(12);

const max12WithMessage = max12("Message");

const max13WithMessage = max(13, "Message");

// Return "Message" if `a` is smaller than 12, otherwise undefined.

max12WithMessage(a);
max12("Message", a);
max(12, "Message", a);
max(12)("Message")(a);

`schema`

Using schema you'll be able to define the rules for a validation function by passing in an object in the same shape as your values.

It automatically wraps the entire validation result if any of your validations are run asynchronously.

import { schema, required, email } from "@hornbeck/validators";

const validate = schema({
    firstName: required("Required"),
    email: [required("Required"), email("Must be a valid email")]
    address: {
        line1: required("Required"),
        postcode: required("Required"),
    }
})

validate({
    firstName: "",
    email: "asdf@",
    address: {
        line1: "",
        postcode: "",
    },
})
// returns
{
    firstName: "Required",
    email: "Must be a valid email",
    address: {
        line1: "Required",
        postcode: "Required",
    },
}

Validators

required
maxLength
minLength
max
min
pattern
positive
negative
creditCard - validate the format of credit card number. (disclaimer: this only verifies that a credit card number matches the format, it does not validate or verify the creditcard is actually usable)
guid
email
validateFn - a helper for creating your own validation functions

Note: the following two validators are made specifically for @hornbeck/react-form, but a similar thing can probably be done for any other form handling package you use.

smaller
greater