format number with commas javascript code example

Example 1: number with commas js

function numberWithCommas(x) {
  return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
}

Example 2: js format number thousands separator

function numberWithCommas(x) {
    return x.toString().replace(/\B(?<!\.\d*)(?=(\d{3})+(?!\d))/g, ",");
}

Example 3: format money javascript commas

function formatMoney(n) {
    return "$ " + (Math.round(n * 100) / 100).toLocaleString();
}

n = 2123000;
// =>2,123,000

Example 4: add comma to number javascript

var n = 34523453.345
n.toLocaleString()
"34,523,453.345"

Example 5: javascript format numbers with commas

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

Example 6: javascript friendly number format with commas

//ES6 Way
const numberWithCommas = (x) => {
  return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
}