Node.js Tutorial for Beginners

1. What is Node

2. Node Architecture

3. How Node Works

4. Installing Node

5. Your First Node Program

function sayHello(name) {
console.log('Hello '+name);
}

sayHello('Karam');

6. Node Module System

7. Global Object

// global.변수명

global.setTimeout()
global.clearTimeout();
global.setInterval();
global.clearInterval();

8. Modules

// app.js

console.log(module);

Module {
  id: '.',
  path: 'C:\\workspace\\first-app',
  exports: {},
  parent: null,
  filename: 'C:\\workspace\\first-app\\app.js',
  loaded: false,
  children: [],
  paths: [
    'C:\\workspace\\first-app\\node_modules',
    'C:\\workspace\\node_modules',
    'C:\\node_modules'
  ]
}

9.Creating a Module

// logger.js

var url = 'http://mylogger.io.log';

function log(message){
    // Send an HTTP request
    console.log('hello, log message is ' + message);
}

module.exports.log = log;

10. Loading a Module

//app.js

var logger = require('./logger');

console.log(logger);
logger.log('message');

{ log: [Function: log] }
hello, log message is message

// logger.js
var url = 'http://mylogger.io.log';

function log(message){
    // Send an HTTP request
    console.log('hello, log message is ' + message);
}

module.exports = log;

// app.js

const log = require('./logger'); // var가 아닌 const를 사용하는 이유: 변수의 재할당을 막기 위해서

log('message');

11. Module Wrapper Function

12. Path Module

13. OS Module

14. File System Module

15. Events Module

16. Event Arguments

17. Extending EventEmitter

18. HTTP Module

注意事項