country-vat/scripts/postinstall.mjs

Get a country VAT rate. ISO 3166-1 compliant.

import { writeFile } from 'fs/promises'

const URL =
  'https://raw.githack.com/valeriansaliou/node-sales-tax/master/res/sales_tax_rates.json'

const mapper = rates =>
  Object.keys(rates).reduce((acc, alpha2) => ({
    ...acc,
    [alpha2]: rates[alpha2].rate
  }))

fetch(URL)
  .then(res => {
    if (!res.ok) throw new Error(`HTTP error! status: ${res.status}`)
    return res.json()
  })
  .then(rates =>
    writeFile('src/rates.json', JSON.stringify(mapper(rates), null, 2))
  )
  .catch(error => console.error(error) || process.exit(1))