how to serve static files with express code example

Example 1: node express server static files

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

//app.use(express.static(__dirname)); // Current directory is root
app.use(express.static(path.join(__dirname, 'public'))); //  "public" off of current is root

app.listen(80);
console.log('Listening on port 80');

Example 2: express public

app.use(express.static(__dirname + '/public'));

Example 3: express img folder

app.use(express.static('public'))

Example 4: express serve static

app.use('/static', express.static(__dirname + '/public'));

Example 5: app.use public

app.use(express.static('public'))
app.use(express.static('files'))

Example 6: app.use public

express.static(root, [options])