Programming wiki2:nodejs
https://wikiprogramming.alfredgg.dev/
2026-05-13T10:15:47+0000Programming
https://wikiprogramming.alfredgg.dev/
https://wikiprogramming.alfredgg.dev/lib/tpl/dokuwiki/images/favicon.icotext/html2020-05-09T09:25:10+0000Anonymous (anonymous@undisclosed.example.com)Express JS
https://wikiprogramming.alfredgg.dev/doku.php?id=wiki2:nodejs:express&rev=1589016310&do=diff
Express JS
Basic
Installing
* Create a packages.json: $ npm init
* Install Express and save it in packages: $ npm install express --save
Basic app
var express = require('express');
var app = express();
app.listen(3000, function() {
console.log("server started on Port 3000");
})text/html2020-05-09T09:25:10+0000Anonymous (anonymous@undisclosed.example.com)NodeJS Patterns & good practices
https://wikiprogramming.alfredgg.dev/doku.php?id=wiki2:nodejs:patterns&rev=1589016310&do=diff
NodeJS Patterns & good practices
Singleton
//area.js
var PI = Math.PI;
function circle (radius) {
return radius * radius * PI;
}
module.exports.circle = circle;
var areaCalc = require('./area');
console.log(areaCalc.circle(5));
Observertext/html2020-05-09T09:25:10+0000Anonymous (anonymous@undisclosed.example.com)NodeJS Resources
https://wikiprogramming.alfredgg.dev/doku.php?id=wiki2:nodejs:resources&rev=1589016310&do=diff
NodeJS Resources
Body Parser
Con express:
var bodyParser = require('body-parser');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended:false}));
Nodemon
To mantain the server up: npm install nodemon -g. Now the app.js and all its folder will be refreshed without needing to restart.