Immutable-cpf NPM

Immutable CPF

A tiny library to handle CPF in an immutable flavour.

The CPF (Cadastro de Pessoas Físicas, sepeˈɛfi; portuguese for "Natural Persons Register") is the Brazilian individual taxpayer registry identification. This number is attributed by the Brazilian Federal Revenue to Brazilians and resident aliens who, directly or indirectly, pay taxes in Brazil.

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Installation

Use the npm package manager to install Immutable CPF.

npm i immutable-cpf

Usage

The library provides a the CPF class to create immutable instances representing CPF documents. You can create instances with any iterable of digits and format or validate them. See the example:

import { CPF } from 'immutable-cpf';

const cpf = new CPF([3, 1, 6, 7, 5, 7, 4, 5, 5, 0, 1]);

cpf.equals(cpf); // true

cpf.checkValidity(); // true

cpf.format(); // '316.757.455-01'

You can also create instances from strings using the CPF.from method.

import { CPF } from 'immutable-cpf';

const cpfA = new CPF([3, 1, 6, 7, 5, 7, 4, 5, 5, 0, 1]);
const cpfB = CPF.from('316.757.455-01');
const cpfC = CPF.from('3  1  6 7 5  7 4 5  5 0   1   ');

cpfA.equals(cpfB); // true

cpfA.equals(cpfC); // true

The CPF class implements the Evaluable interface and it's suitable to be used along ImmutableJS data structures.

The method CPF.prototype.getValidity returns the validity state of the instance. If you only want to check if the instance is valid or not, see the CPF.prototype.checkValidity method.

import { CPF } from 'immutable-cpf';

const empty = new CPF([]);
empty.checkValidity(); // false, it's empty

const semi = new CPF([3, 1, 6, 7]);
semi.checkValidity(); // false, it's not complete

const invalid = new CPF([3, 1, 6, 7, 5, 7, 4, 5, 5, 1, 2]);
semi.checkValidity(); // false, its check digits fails

const valid = new CPF([3, 1, 6, 7, 5, 7, 4, 5, 5, 0, 1]);
valid.checkValidity(); // true

The library also provides the method CPF.create to generate valid instances with pseudo-random numbers.

import { CPF } from 'immutable-cpf';

const cpf = CPF.create();

cpf.checkValidity(); // true

The default JSON serialization a CPF instance is a string. You can also access it directly calling the CPF.prototype.toJSON.

import { CPF } from 'immutable-cpf';

const user = {s
  name: 'José Silva',
  cpf: new CPF([3, 1, 6, 7, 5, 7, 4, 5, 5, 0, 1]),
};

JSON.stringify(user); // '{"name": "José Silva", "cpf": "31675745501"}'

user.cpf.toJSON(); // '31675745501'