Scientific notation support

[ghtaylor]

Expected Behavior

1. Provide a string value that uses scientific notation to currency(value)
2. Value represented in currency object is correct

Actual Behavior

1. Provide a string value that uses scientific notation to currency(value)
2. Value represented in currency object is incorrect

Steps to Reproduce the Problem

CodeSandbox describing problem

1. Declare string that is a currency amount represented by scientific notation:

const scientificNotationAmount: string = "1.299078055E7";

2. Provide string as value to currency(value)

const amount = currency(scientificNotationAmount);

3. Log .value property of amount

// Currency.js value
console.log(amount.value) // 1.3
// Expected value
console.log(Number(scientificNotationAmount)) // 12_990_780.55

Motivation

Whilst integrating with a third-party accounting and finance management system, their APIs return amount values over 10,000,000 or less than -10,000,000 as scientific notation values. We did not know that currency.js doesn't pick this up, and it caused a bug in our system.

Note

I am happy to try and make a PR if its agreed this would be a worthwhile enhancement? Please let me know.

[scurker]

I'm not sure how common this is, having currency values formatted as scientific notation isn't something that I've commonly seen. Ideally currency.js is intended to be a lightweight currency formatter with a lot of bloat, so I'm not inclined to include a feature that's not commonly used.

My short suggestion would be if you know a value is in scientific notation, is to throw the value into Number and let currency do the rest. It should be safe for numeric values as well:

currency(Number('1.299078055E7'))