how to send data to client with expressJS
You wouldn't be able to do it with a .html file. You'd need an EJS file. The markup for that would look like this.
<html> <body> <h1>Retrieved <%= data %></h1> </body></html>Then you'll need the ejs module. Run the following NPM command.
npm install ejs
So change your index.html to index.ejs, make sure it's in a directory named views, and then modify your server side code to this.
var express = require("express");var app = express();app.set("view engine", "ejs");app.get("/", function (req, res) { res.render("index", {data: 'This is the data'});});app.listen(10022, function () { console.log("server is up");});EJS is a templating language that converts to HTML, taking the data object you've passed in through your render method, rendering it server side, and then sending it to the browser.