https://devtut.github.io/nodejs/routing-ajax-requests-with-express-js.html
Node.js - Routing ajax requests with Express.JS
A simple implementation of AJAX
node jsajax requestsroutingexpress
https://www.codeigniter.com/user_guide/general/ajax.html
AJAX Requests — CodeIgniter 4.7.4 documentation
ajax requestscodeigniterdocumentation