JavaScript ISO 4217 compliance

00_test.js

// 1. Download https://www.six-group.com/dam/download/financial-information/data-center/iso-currrency/lists/list-one.xml
// 2. Open the downloaded file in your browser
// 3. Launch the development console and run this script

(() => {
  const entries = [...document.querySelectorAll('CcyNtry')];

  const isoMinorUnits = entries.reduce((acc, entry) => {
    const code = entry.querySelector('Ccy')?.textContent;
    if (!code) {
      // Skip entries with missing or empty currency code
      return acc;
    }

    const minorNode = entry.querySelector('CcyMnrUnts');
    if (!minorNode) {
      throw new Error(`Missing <CcyMnrUnts> for currency code: ${code}`);
    }

    const minorText = minorNode.textContent;

    if (code !== 'XXX' && !acc[code]) {
      acc[code] = minorText === 'N.A.' ? 'N.A.' : parseInt(minorText, 10);
    }
    return acc;
  }, {});

  const userAgent = navigator.userAgent;

  const lines = [
    `*Browser User Agent*: ${userAgent}`,
    '| Currency | ISO Digits | JS Digits | Match |',
    '|----------|------------|-----------|-------|'
  ];

  for (const [code, isoDigits] of Object.entries(isoMinorUnits)) {
    let jsDigits;
    try {
      const parts = new Intl.NumberFormat('en', {
        style: 'currency',
        currency: code
      }).formatToParts(1.23);
      const fraction = parts.find(p => p.type === 'fraction');
      jsDigits = fraction ? fraction.value.length : 0;
    } catch {
      jsDigits = 'n/a';
    }

    const match = isoDigits === 'N.A.' ? '-' : (jsDigits === isoDigits ? '✅' : '❌');

    lines.push(`| ${code} | ${isoDigits} | ${jsDigits} | ${match} |`);
  }

  console.log(lines.join('\n'));
})();

results_chrome.md

Browser User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Currency	ISO Digits	JS Digits	Match
AFN	2	0	❌
EUR	2	2	✅
ALL	2	0	❌
DZD	2	2	✅
USD	2	2	✅
AOA	2	2	✅
XCD	2	2	✅
XAD	2	2	✅
ARS	2	2	✅
AMD	2	2	✅
AWG	2	2	✅
AUD	2	2	✅
AZN	2	2	✅
BSD	2	2	✅
BHD	3	3	✅
BDT	2	2	✅
BBD	2	2	✅
BYN	2	2	✅
BZD	2	2	✅
XOF	0	0	✅
BMD	2	2	✅
INR	2	2	✅
BTN	2	2	✅
BOB	2	2	✅
BOV	2	2	✅
BAM	2	2	✅
BWP	2	2	✅
NOK	2	2	✅
BRL	2	2	✅
BND	2	2	✅
BGN	2	2	✅
BIF	0	0	✅
CVE	2	2	✅
KHR	2	2	✅
XAF	0	0	✅
CAD	2	2	✅
KYD	2	2	✅
CLP	0	0	✅
CLF	4	4	✅
CNY	2	2	✅
COP	2	2	✅
COU	2	2	✅
KMF	0	0	✅
CDF	2	2	✅
NZD	2	2	✅
CRC	2	2	✅
CUP	2	2	✅
XCG	2	2	✅
CZK	2	2	✅
DKK	2	2	✅
DJF	0	0	✅
DOP	2	2	✅
EGP	2	2	✅
SVC	2	2	✅
ERN	2	2	✅
SZL	2	2	✅
ETB	2	2	✅
FKP	2	2	✅
FJD	2	2	✅
XPF	0	0	✅
GMD	2	2	✅
GEL	2	2	✅
GHS	2	2	✅
GIP	2	2	✅
GTQ	2	2	✅
GBP	2	2	✅
GNF	0	0	✅
GYD	2	2	✅
HTG	2	2	✅
HNL	2	2	✅
HKD	2	2	✅
HUF	2	2	✅
ISK	0	0	✅
IDR	2	2	✅
XDR	N.A.	2	-
IRR	2	0	❌
IQD	3	0	❌
ILS	2	2	✅
JMD	2	2	✅
JPY	0	0	✅
JOD	3	3	✅
KZT	2	2	✅
KES	2	2	✅
KPW	2	0	❌
KRW	0	0	✅
KWD	3	3	✅
KGS	2	2	✅
LAK	2	0	❌
LBP	2	0	❌
LSL	2	2	✅
ZAR	2	2	✅
LRD	2	2	✅
LYD	3	3	✅
CHF	2	2	✅
MOP	2	2	✅
MKD	2	2	✅
MGA	2	0	❌
MWK	2	2	✅
MYR	2	2	✅
MVR	2	2	✅
MRU	2	2	✅
MUR	2	2	✅
XUA	N.A.	2	-
MXN	2	2	✅
MXV	2	2	✅
MDL	2	2	✅
MNT	2	2	✅
MAD	2	2	✅
MZN	2	2	✅
MMK	2	0	❌
NAD	2	2	✅
NPR	2	2	✅
NIO	2	2	✅
NGN	2	2	✅
OMR	3	3	✅
PKR	2	2	✅
PAB	2	2	✅
PGK	2	2	✅
PYG	0	0	✅
PEN	2	2	✅
PHP	2	2	✅
PLN	2	2	✅
QAR	2	2	✅
RON	2	2	✅
RUB	2	2	✅
RWF	0	0	✅
SHP	2	2	✅
WST	2	2	✅
STN	2	2	✅
SAR	2	2	✅
RSD	2	0	❌
SCR	2	2	✅
SLE	2	2	✅
SGD	2	2	✅
XSU	N.A.	2	-
SBD	2	2	✅
SOS	2	0	❌
SSP	2	2	✅
LKR	2	2	✅
SDG	2	2	✅
SRD	2	2	✅
SEK	2	2	✅
CHE	2	2	✅
CHW	2	2	✅
SYP	2	0	❌
TWD	2	2	✅
TJS	2	2	✅
TZS	2	2	✅
THB	2	2	✅
TOP	2	2	✅
TTD	2	2	✅
TND	3	3	✅
TRY	2	2	✅
TMT	2	2	✅
UGX	0	0	✅
UAH	2	2	✅
AED	2	2	✅
USN	2	2	✅
UYU	2	2	✅
UYI	0	0	✅
UYW	4	4	✅
UZS	2	2	✅
VUV	0	0	✅
VES	2	2	✅
VED	2	2	✅
VND	0	0	✅
YER	2	0	❌
ZMW	2	2	✅
ZWG	2	2	✅
XBA	N.A.	2	-
XBB	N.A.	2	-
XBC	N.A.	2	-
XBD	N.A.	2	-
XTS	N.A.	2	-
XAU	N.A.	2	-
XPD	N.A.	2	-
XPT	N.A.	2	-
XAG	N.A.	2	-

results_firefox.md

Browser User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.0

Currency	ISO Digits	JS Digits	Match
AFN	2	2	✅
EUR	2	2	✅
ALL	2	2	✅
DZD	2	2	✅
USD	2	2	✅
AOA	2	2	✅
XCD	2	2	✅
XAD	2	2	✅
ARS	2	2	✅
AMD	2	2	✅
AWG	2	2	✅
AUD	2	2	✅
AZN	2	2	✅
BSD	2	2	✅
BHD	3	3	✅
BDT	2	2	✅
BBD	2	2	✅
BYN	2	2	✅
BZD	2	2	✅
XOF	0	0	✅
BMD	2	2	✅
INR	2	2	✅
BTN	2	2	✅
BOB	2	2	✅
BOV	2	2	✅
BAM	2	2	✅
BWP	2	2	✅
NOK	2	2	✅
BRL	2	2	✅
BND	2	2	✅
BGN	2	2	✅
BIF	0	0	✅
CVE	2	2	✅
KHR	2	2	✅
XAF	0	0	✅
CAD	2	2	✅
KYD	2	2	✅
CLP	0	0	✅
CLF	4	4	✅
CNY	2	2	✅
COP	2	2	✅
COU	2	2	✅
KMF	0	0	✅
CDF	2	2	✅
NZD	2	2	✅
CRC	2	2	✅
CUP	2	2	✅
XCG	2	2	✅
CZK	2	2	✅
DKK	2	2	✅
DJF	0	0	✅
DOP	2	2	✅
EGP	2	2	✅
SVC	2	2	✅
ERN	2	2	✅
SZL	2	2	✅
ETB	2	2	✅
FKP	2	2	✅
FJD	2	2	✅
XPF	0	0	✅
GMD	2	2	✅
GEL	2	2	✅
GHS	2	2	✅
GIP	2	2	✅
GTQ	2	2	✅
GBP	2	2	✅
GNF	0	0	✅
GYD	2	2	✅
HTG	2	2	✅
HNL	2	2	✅
HKD	2	2	✅
HUF	2	2	✅
ISK	0	0	✅
IDR	2	2	✅
XDR	N.A.	2	-
IRR	2	2	✅
IQD	3	3	✅
ILS	2	2	✅
JMD	2	2	✅
JPY	0	0	✅
JOD	3	3	✅
KZT	2	2	✅
KES	2	2	✅
KPW	2	2	✅
KRW	0	0	✅
KWD	3	3	✅
KGS	2	2	✅
LAK	2	2	✅
LBP	2	2	✅
LSL	2	2	✅
ZAR	2	2	✅
LRD	2	2	✅
LYD	3	3	✅
CHF	2	2	✅
MOP	2	2	✅
MKD	2	2	✅
MGA	2	2	✅
MWK	2	2	✅
MYR	2	2	✅
MVR	2	2	✅
MRU	2	2	✅
MUR	2	2	✅
XUA	N.A.	2	-
MXN	2	2	✅
MXV	2	2	✅
MDL	2	2	✅
MNT	2	2	✅
MAD	2	2	✅
MZN	2	2	✅
MMK	2	2	✅
NAD	2	2	✅
NPR	2	2	✅
NIO	2	2	✅
NGN	2	2	✅
OMR	3	3	✅
PKR	2	2	✅
PAB	2	2	✅
PGK	2	2	✅
PYG	0	0	✅
PEN	2	2	✅
PHP	2	2	✅
PLN	2	2	✅
QAR	2	2	✅
RON	2	2	✅
RUB	2	2	✅
RWF	0	0	✅
SHP	2	2	✅
WST	2	2	✅
STN	2	2	✅
SAR	2	2	✅
RSD	2	2	✅
SCR	2	2	✅
SLE	2	2	✅
SGD	2	2	✅
XSU	N.A.	2	-
SBD	2	2	✅
SOS	2	2	✅
SSP	2	2	✅
LKR	2	2	✅
SDG	2	2	✅
SRD	2	2	✅
SEK	2	2	✅
CHE	2	2	✅
CHW	2	2	✅
SYP	2	2	✅
TWD	2	2	✅
TJS	2	2	✅
TZS	2	2	✅
THB	2	2	✅
TOP	2	2	✅
TTD	2	2	✅
TND	3	3	✅
TRY	2	2	✅
TMT	2	2	✅
UGX	0	0	✅
UAH	2	2	✅
AED	2	2	✅
USN	2	2	✅
UYU	2	2	✅
UYI	0	0	✅
UYW	4	4	✅
UZS	2	2	✅
VUV	0	0	✅
VES	2	2	✅
VED	2	2	✅
VND	0	0	✅
YER	2	2	✅
ZMW	2	2	✅
ZWG	2	2	✅
XBA	N.A.	2	-
XBB	N.A.	2	-
XBC	N.A.	2	-
XBD	N.A.	2	-
XTS	N.A.	2	-
XAU	N.A.	2	-
XPD	N.A.	2	-
XPT	N.A.	2	-
XAG	N.A.	2	-