Formations NPM

Formations

A simple and complete server-side and client-side validations library in ES6 JavaScript compiled with Babel.

Influence

Play Framework 2.x.x allows easily defined and testable form validations.

Features

Easily transformable constraints i.e. number.min(10).max(56) or text.matches("[A-Za-z]")
Makes no assumption of client/server
Validates JSON forms
"true" and true will both validate as booleans (same with other validation types)
Validate on your own "types" by writing text constraints
Cross-form validation (lame example for now)

Install

To install, just run: npm install --save formations

Usage

Here is an example validation for a register form.

import * as formations from 'formations';
import {text, number, email} from 'formations/lib/Validations';
 
var form = formations.createForm(document, ['name', 'email', 'password', 'age']);
 
var registerValidation = {
  name: text.minLength(2, "You need a bigger name.").maxLength(32, "Your name must be less than 33 characters.."),
  password: text.bounds(8, 64, "Your password must be between 8 and 64 characters."),
  email: email.maxLength(64, "Use a smaller e-mail, please!"),
  age: number.min(13, "You must be at least 13 years old.").max(80, "You're too old for this, dude."),
  correctAge: boolean.cross('age', number.bounds(13, 80), boolean.equals(true), "You have to say if you're the correct age.")
};
 
var results = formations.validateForm(form, registerValidation);
 
if(results.passed())
  console.log("You're good to go!");
else
  console.log("fail");