js 千位分隔符

const number = 1234567.89;
const formattedNumber = number.toLocaleString();
console.log(formattedNumber); // 输出: "1,234,567.89"

function addThousandSeparator(num) {
    return num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
}

const number = 1234567.89;
const formattedNumber = addThousandSeparator(number);
console.log(formattedNumber); // 输出: "1,234,567.89"

const number = 1234567.89;
const formatter = new Intl.NumberFormat('en-US', {
    minimumFractionDigits: 2,
    maximumFractionDigits: 2,
});
const formattedNumber = formatter.format(number);
console.log(formattedNumber); // 输出: "1,234,567.89"

const number = 1234567.89;
const formatter = new Intl.NumberFormat('de-DE', {
    minimumFractionDigits: 2,
    maximumFractionDigits: 2,
});
const formattedNumber = formatter.format(number);
console.log(formattedNumber); // 输出: "1.234.567,89"