ratnum

arbitrary-precision arithmetics in JavaScript

this library is based on bigint type so it's precision has virtually the same limitations as bigint limitations

0.1 + 0.2 === 0.30000000000000004?

NO MORE

if you need to perform a precise calculation just use this library, and it looks like this:

import RationalNumber from 'ratnum'

console.log(Number(new RationalNumber(0.1).add(0.2)))
/// 0.3

view the test files for more usage examples

unfortunately JavaScript has poor support of operator overloading so you'll be forced to use those ugly methods like .add, .substract, etc., but simple overloads like .toString (String(...)), valueOf (Number(...)) and toJSON (JSON.stringify(...)) are supported

pull-requests and suggestions are welcomed