Node.js

COMP 426 w01.01

1. Running JS in a command terminal
2. Structuring an NPM package
3. Node console.log()
4. Scripting and dependencies
5. const
6. Arrow functions

Hello, world.

$ node -e 'console.log("Hello, world.")
'Hello, world.
					

Hello, world.

const hello = "Hello, world."
console.log(hello)
					

package.json

{
	"name": "my-own-private-web-server",
        "version": "0.0.1",
        "description": "This package contains a very simple web server that takes one argument for port and then serves index.html in the www directory.",
        "main": "server.js",
        "scripts": {
              "test": "node server.js",
              "start": "node server.js"
        },
        "author": "John D. Martin III",
        "license": "GPL-3.0-or-later",
        "dependencies": {
            "minimist": "^1.2.5"
        }
}
					

const

const http = require('http')
const fs = require('fs')
const args = require('minimist')(process.argv.slice(2))
					

Arrow functions

( params ) => { statements }
            
const name = ( params ) => { statements }
					

Arrow functions

(req, res) => {
	res.statusCode = 200
	res.setHeader('Content-Type', 'text/html')
	res.end(data)
}
					

Arrow functions

const server = http.createServer((req, res) => {
	res.statusCode = 200
	res.setHeader('Content-Type', 'text/html')
	res.end(data)
})