Parse a number-like string to a locale aware Number

parseLocaleNumber.js

const parseLocaleNumber = (input, locale) => {
    const formatter = Intl.NumberFormat(locale);
    const [, { value: thousandSeparator }] = formatter.formatToParts(11111);
    const [, { value: decimalSeparator }] = formatter.formatToParts(1.1);

    return parseFloat(input
        .replace(new RegExp('\\' + thousandSeparator, 'g'), '')
        .replace(new RegExp('\\' + decimalSeparator), '.')
    );
}

Grundsätzlich fein. Hier ist ein recht kompletter Ansatz: https://observablehq.com/@mbostock/localized-number-parsing

Hier gefunden: https://stackoverflow.com/a/55366435