const digitsRE = /(\d{3})(?=\d)/g export function currency (value, currency, decimals) {
    value = parseFloat(value)   if (!isFinite(value) || (!value && value !== 0)) return ''   currency = currency != null ? currency : '$'   decimals = decimals != null ? decimals : 2   var stringified = Math.abs(value).toFixed(decimals)   var _int = decimals     ? stringified.slice(0, -1 - decimals)     : stringified   var i = _int.length % 3   var head = i > 0     ? (_int.slice(0, i) + (_int.length > 3 ? ',' : ''))     : ''   var _float = decimals     ? stringified.slice(-1 - decimals)     : ''   var sign = value < 0 ? '-' : ''   return sign + currency + head +     _int.slice(i).replace(digitsRE, '$1,') +     _float }