Validazz NPM | npm.io

validazz

Magical, Flexible and Extendible Javascript Validation.

Install

npm:

npm i validazz

Yarn:

yarn add validazz

Usage

import Validator, { rules } from 'validazz'

const mySuperCoolValidator = Validator.factory()

// Let's add some rules
mySuperCoolValidator.addRule(rules.isRequired)
mySuperCoolValidator.addRules([rules.minLength(2), rules.maxLength(8)])
mySuperCoolValidator.addRule(rules.isString)

// How about a custom rule?
const customRule = {
  runWithValue: value => {
    if (value !== '🤪') return false
    return true
  },
  message: 'Houston, we got a problem',
}
mySuperCoolValidator.addRule(customRule)

// Okay let's start validating
const { success, failed } = mySuperCoolValidator.runWithValue('hello')
if (success) {
  console.log('Wow, this was validated just like that')
} else {
  const { message } = failed
  console.log(`Okay so here's the error message: ${failed}`)
}

For a list of all the included rules, be sure to check the RULES.md file

API

validazz

Magical, Flexible and Extendible Javascript Validation.

Install

npm:

npm i validazz

Yarn:

yarn add validazz

Usage

import Validator, { rules } from 'validazz'

const mySuperCoolValidator = Validator.factory()

// Let's add some rules
mySuperCoolValidator.addRule(rules.isRequired)
mySuperCoolValidator.addRules([rules.minLength(2), rules.maxLength(8)])
mySuperCoolValidator.addRule(rules.isString)

// How about a custom rule?
const customRule = {
  runWithValue: value => {
    if (value !== '🤪') return false
    return true
  },
  message: 'Houston, we got a problem',
}
mySuperCoolValidator.addRule(customRule)

// Okay let's start validating
const { success, failed } = mySuperCoolValidator.runWithValue('hello')
if (success) {
  console.log('Wow, this was validated just like that')
} else {
  const { message } = failed
  console.log(`Okay so here's the error message: ${failed}`)
}

For a list of all the included rules, be sure to check the RULES.md file

API

Validator

Validation Factory, where all the validation magic happens

Type: Validator

Parameters

rules Array<ValidationRule> List of rules to initalize with (optional, default [])

addRule

Add a rule to the factory

Parameters

rule ValidationRule A validation rule

Returns Validator Validator instance

addRules

Add a rules to the factory

Parameters

rules Array<ValidationRule> An array of rules to add

Returns Validator Validator instance

runWithValue

See: validate

Run the factory and validate!

Parameters

value string The string to be validated

Returns ValidatorResult The validation outcome

Meta

deprecated: Use validate(value: string) instead. Depricated since v1.1

validate

Validates a string

Parameters

value String The string to be validated

Examples

const { success, failed } = Validator.factory(rules.isRequired).validate(
  'hello'
)

Returns ValidatorResult The validation outcome

factory

Create a new validation factory

Parameters

rules Array<ValidationRule> List of rules to initalize the factory with (optional, default [])

Examples

const validator = Validator.factory([])

Returns Validator Validator instance

runWithValue

The validation function for this rule. It takes the a string/integer value and returns a boolean.

Type: Function

Parameters

value string Value of array element

Examples

const rule = {
  runWithValue(value) {
    return value != null
  },
}

Returns Boolean If it returns true, the field is valid.

ValidationRule

A validation rule

Type: Object

Properties

message string A custom error message for this validation rule
runWithValue runWithValue Validation callback

Examples

// Basic Example
const validationRule = {
  message: 'This field is required',
  runWithValue(value) {
    return value != null
  },
}

// Example with parameters
const minimum = min => ({
  message: `Amount must be greater than ${min}`,
  runWithValue(value) {
    const value = Number(value)
    return value > min
  },
})

ValidatorResult

The validation result

Type: Object

Properties

success Boolean The outcome of the validation
failed ValidationRule An optional value. Returns the rule that failed to validate

Examples

const { success, failed } = Validator.factory(rules.isRequired).validate(
  'hello'
)
if (success) {
  alert('validated')
} else {
  const { message } = failed
  alert(`Failed: ${message}`)
}