s-valid.js

Simple modular string validator

For common tests (credit cards, urls, email addresses, ...)

• Dependency-free
• Tested on node & iojs
• Uses es6, so transpile for browser use

Note: Strings only!

This module simplifies validation that requires regular expressions or multiple steps. It will not include anything that is already simple to calculate and reason about, such as string length.

Installation

npm install --save s-valid

Usage

var valid = require('s-valid');

// simple validation
if (valid.email('[email protected]')) {
	// ...
}

// primary use case: server-side form validation
if (!valid.email(req.body.email)) {
	// return error...
}

Use it modularly if you prefer

var email = require('s-valid/email');

if (email('[email protected]')) {
	// ...
}

All Methods

Affirmative / Negatory

valid.affirmative('yes'); // true
valid.affirmative('y'); // true
valid.affirmative('on'); // true
valid.affirmative('true'); // true

valid.negatory('no'); // true
valid.negatory('n'); // true
valid.negatory('off'); // true
valid.negatory('false'); // true

Alpha (alphabetic) / Numeric / AlphaNumeric

valid.alpha('Foo'); // true
valid.alpha('Foo bar'); // false
valid.alpha('Test123'); // false

valid.numeric('123'); // true
valid.numeric('-123'); // true
valid.numeric('123px'); // false
valid.numeric('$123000'); // false

valid.alphaNumeric('Test123'); // true
valid.alphaNumeric('Tést'); // false
valid.alphaNumeric('Test 123'); // false
valid.alphaNumeric('Test_123'); // false
valid.alphaNumeric('Test-123'); // false

CreditCard

Note: valid.creditCard() is an alias for valid.card.generic()

valid.creditCard('4242424242424242'); // true (matches Visa regexp)
valid.creditCard('5610591081018250'); // true with no regexp match (Australian Bankcard)
valid.creditCard('1234123412341234'); // false

Card.{type}

• Amex (amex)
• Carte Blanche (carteBlanche)
• Diners Club (dinersClub)
• Discover (discover)
• JCB (jcb)
• Lasercard (lasercard)
• Maestro (maestro)
• Mastercard (mastercard)
• Solo & Switch (solo)
• Unionpay (unionpay)
• Visa (visa)

valid.card.amex('371449635398431'); // true
valid.card.amex('4242424242424242'); // false (is Visa)

Email

valid.email('[email protected]'); // true
valid.email('email@test'); // false

Social Security Number (USA)

valid.socialSecurity('078-05-1120'); // true (from Wikipedia)
valid.socialSecurity('078-00-1120'); //false
valid.socialSecurity('078051120'); // false

Value string

Similar to numeric, but less restrictive. Passes for $ (or any non-number first character), commas, and units (such as 12px or 38BTC)

valid.value('123'); // true
valid.value('-123'); // true
valid.value('#000000'); // true
valid.value('123px'); // true
valid.value('$123,000.00'); // true
valid.value('test'); // false
valid.value('Infinity'); // false

URL

valid.url('http://test.com'); // true
valid.url('https://test.com'); // true
valid.url('https://test.com:3000'); // true -- works with port numbers
valid.url('http://4.35.153.221'); // true -- IP addresses are valid URLs
valid.url('http://300.35.153.221'); // false -- invalid IP addresses fail
valid.url('http:/test.com'); // false

Zip code

valid.zipCode('89052'); // true
valid.zipCode('89052-6589'); // false
valid.zipCode('890526589'); // false

Zip code + 4

Additional 4-digit code is optional and must be separated by a hyphen

valid.zipCodeLong('89052'); // true
valid.zipCodeLong('89052-6589'); // true
valid.zipCodeLong('890526589'); // false

Additional notes

is.js provided some of the regular expressions used behind-the-scenes, however the following improvements have been made to them:

• URLs can include the port number and be IP addresses without failing
• Affirmative string values can include any capitalization
• "on" is also considered affirmative (useful for capturing checkbox values in POST requests)
• Negatory string values ("off", "no", "false") have been added
• More credit card types will pass validation