how to res.send to html page node js code example

Example 1: express sendfile html

var express = require('express');
var app = express();
var path = require('path');

// viewed at http://localhost:8080
app.get('/', function(req, res) {
    res.sendFile(path.join(__dirname + '/index.html'));
});

app.listen(8080);

Example 2: send html file express

res.sendFile(path.join(__dirname + '/index.html'));