Validator

Install

npm i --save @relekang/validator

Usage

var Validator = require('@relekang/validator')

var validator = Validator({
  field: { required: true }
})

validator.validate(['field'], {})
// => { field: { field: 'field', rule: 'required', value: undefined } }

Adding new rules

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 } }

Creating rules

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.