formula

formula

A formula parser and function library for browsers and Node.js.

Install

npm install --save formula

// import the the entire library
var f = require('formula')

// import specific files
var isArray = require('formula/fn/isarray')

Usage

var { run, and, eq, len, gt, lt, isnumber, isText, isEmail, isEmpty, lower, proper, text, date}
= require('formula')

run("a + b", { a: 2, b: 2})
isnumber(1),
isText('this is'),
isEmail('[e-mail]'),
isEmpty(''),
gt(2, 1),
lt(1, 2),
and(true, false, true),
eq(len('foo'), 3),
eq(lower('HAPPY'), 'happy'),
eq(proper('happy'), 'Happy'),
eq(text(4200.00, "$#,###.00"), '$4,200.00'),
eq(text(date(2000, 2, 1), "m-d-yyyy"), '2-1-2000')

Optionally, may load specific functions to reduce bundle size.

var isNumber = require('formula/fn/isnumber')
var proper = require('formula/fn/proper')

Runtime Dependencies

formula depends on a modern JavaScript runtime.

Load polyfills for old browsers:

require('core-js/fn/array/filter');
require('core-js/fn/array/map');
require('core-js/fn/array/reduce');
require('core-js/fn/object/assign');
require('core-js/fn/object/keys');
require('core-js/fn/number/is-nan');