this library is based on bigint type so it's precision has virtually the same limitations as bigint limitations
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)))
/// 0.3view 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