JSFiddle - React, Tailwind, and code Playground
by neptune001
JavaScript
var response1 = '15000.45'.replace(/(\d)(?=(\d{3})+\.)/g, '$1,');
var response2 = '15000'.replace(/(\d)(?=(\d{3})+\.)/g, '$1,');
console.log(response1);
console.log(response2);