const numberFormat1 = new Intl.NumberFormat('de-DE');
const options1 = numberFormat1.resolvedOptions();
console.log(options1.locale);
// expected output (Firefox / Safari): "de-DE"
// expected output (Chrome): "de"
console.log(options1.numberingSystem);
// expected output: "latn"
console.log(options1.style);
// "decimal"