npm i --save @relekang/validator
var Validator = require('@relekang/validator')
var validator = Validator({
field: { required: true }
})
validator.validate(['field'], {})
// => { field: { field: 'field', rule: 'required', value: undefined } }var validatorCreator = require("@relekang/validator").extend;
var Validator = validatorCreator({
mod: (field, value, options) => value % options.constant === 0 ? null : 'mod'
});
Validator({ f: { mod: { constant: 2 } }).validate(['f'], { f: 3 })
// => { f: { field: 'f', rule: 'mod', value: 3 } }A rule is a function that takes three arguments: field, value and options. It then validates the value based on a given conditions and
returns null if the value validates. If not it should return the name of the
rule that did not validate. A rule can have sub-rules (e.g. numeric validation with max value). It should then return 'rule/sub-rule' if the data does not validate.