@yaffle/bigdecimal

BigDecimal

a polyfill for decimal propocal - https://github.com/tc39/proposal-decimal

Usage:

Type conversion:

BigDecimal.BigDecimal(string)

BigDecimal.BigDecimal(bigint)

BigDecimal.BigDecimal(number) (only integers)

a.toString()

BigDecimal.toBigInt(a) (not in the spec)

BigDecimal.toNumber(a) (not in the spec, only integers)

Arithmetic:

BigDecimal.unaryMinus(a)

BigDecimal.add(a, b[, rounding])

BigDecimal.subtract(a, b[, rounding])

BigDecimal.multiply(a, b[, rounding])

BigDecimal.divide(a, b, rounding)

BigDecimal.round(a, rounding)

Comparison:

BigDecimal.equal(a, b)

BigDecimal.lessThan(a, b)

BigDecimal.greaterThan(a, b)

Math: (not in the spec)

BigDecimal.log(a, rounding)

BigDecimal.exp(a, rounding)

BigDecimal.sin(a, rounding)

BigDecimal.cos(a, rounding)

BigDecimal.atan(a, rounding)

The rounding argument may look like {maximumFractionDigits: 10, roundingMode: "half-even"} or {maximumSignificantDigits: 10, roundingMode: "half-even"}, where the roundingMode can be "floor", or "ceil", or "half-even", or "half-up".

Similar projects:

1. https://github.com/MikeMcl/decimal.js/
2. https://github.com/uzyn/bigdenary
3. ...