Node Js

ln -s /usr/bin/nodejs /usr/bin/node

Install NVM Manjaro Linux

sudo pacman -S nvm

nvm install --lts
npm install "package name"
nvm uninstall --lts

Getting Started npm

npm install <package-name>

 --save-dev        saves to devDependencies
 --no-save         saves to Dependencies
 --save-optional   saves to optionalDependencies
 --no-optional

 -S --save
 -D --save-ve
 -O --save-optional

npm update

npm update <package-name>

npm install <package-name>@<version>

Running Tasks

npm run <task-name>

{
    "scripts":{
        "start-dev": "node lib/server-development"
        "start": "node lib/server-production"
    }
}
npm run start-dev

node -p process.versions.v8

http Server Sample

const http = require('http');

const hostname = '127.0.0.1';
const port = 3000;

const server = http.createServer((req, res) => {
  res.status = 200;
  res.setHeader('Content-Type','text/plain');
  res.end('Hello World');
});

server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});

Development, Production Environment

{
    "scripts":{
        "start-dev": "node lib/server-development"
        "start": "node lib/server-production"
    }
}

in bash:

export NODE_ENV=production
NODE_ENV=production node app.js

if (process.env.NODE_ENV === 'development'){
  app.use(express.errorHandler({ dumpExecptions: true, showStack: true }));
}

if (process.env.NODE_ENV === 'production'){
  app.use(express.errorHandler());
}

if (['production', 'staging'].includes(process.env.NODE_ENV)){
  //
}

http:///wiki/?nodejs