Does JavaScript take local decimal separators into account?

Question

I\'ve got a web page that displays decimals in a user\'s localized format, like so:

• English: 7.75
• Dutch: 7,75

Answer 1

Here's an example for a locale aware number parser:

function parseLocaleNumber(stringNumber) {
    var thousandSeparator = (1111).toLocaleString().replace(/1/g, '');
    var decimalSeparator = (1.1).toLocaleString().replace(/1/g, '');

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

It uses the current locale of the browser to replace thousand and decimal separators.

With a German locale setting

var n = parseLocaleNumber('1.000.045,22');

n will be equal to 1000045.22.