JSFiddle - React, Tailwind, and code Playground

JavaScript

var text= "ABC.DEF.XYZ";
response = text.replace(/\./g,'x');
alert(response);

var text= "ABC.DEF.XYZ";
response = text.replace(new RegExp("\\.","gm"),"x");
alert(response);

var text= "ABC.DEF.XYZ";
response = text.split('.').join('x');
alert(response);