[6.Nodejs] Node.js 전역변수

Nodejs에는 기본코드를 작성하면 런타임시에 function으로 묶어서 총 5개의 파라메터를 넘겨주면서 run하게 됩니다,

exports, require, module는 Node.js 내부의 객체를 다루는 객체이고

__filename, __dirname은 자신의 파일이름, 프로젝트의 경로등의 자료로 사용됩니다.

Node프로젝트를 생성할때 만들어지는 js파일 > 우클릭 > Debug As > Node Application

(function (exports, require, module, __filename, __dirname) { var http = require('http'); http.createServer(function handler(req, res) { res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello World\n'); }).listen(1337, '127.0.0.1'); console.log('Server running at http://127.0.0.1:1337/');

exports

console.log(exports); >>>> {}

require

console.log(require); >>>> { [Function: require] resolve: [Function], main: { id: '.', exports: {}, parent: null, filename: 'D:\\03_private\\[140728] NodeJs\\HelloWorld\\test\\fibonaccie-test.js', loaded: false, children: [ [Object] ], paths: [ 'D:\\03_private\\[140728] NodeJs\\HelloWorld\\test\\node_modules', 'D:\\03_private\\[140728] NodeJs\\HelloWorld\\node_modules', 'D:\\03_private\\[140728] NodeJs\\node_modules', 'D:\\03_private\\node_modules', 'D:\\node_modules' ] }, extensions: { '.js': [Function], '.json': [Function], '.node': [Function] }, registerExtension: [Function], cache: { 'D:\\03_private\\[140728] NodeJs\\HelloWorld\\test\\fibonaccie-test.js': { id: '.', exports: {}, parent: null, filename: 'D:\\03_private\\[140728] NodeJs\\HelloWorld\\test\\fibonaccie-test.js', loaded: false, children: [Object], paths: [Object] }, 'D:\\03_private\\[140728] NodeJs\\HelloWorld\\fibonaccie.js': { id: 'D:\\03_private\\[140728] NodeJs\\HelloWorld\\fibonaccie.js', exports: [Object], parent: [Object], filename: 'D:\\03_private\\[140728] NodeJs\\HelloWorld\\fibonaccie.js', loaded: true, children: [], paths: [Object] } } }

module

console.log(module); >>>>> { id: '.', exports: {}, parent: null, filename: 'D:\\03_private\\[140728] NodeJs\\HelloWorld\\test\\fibonaccie-test.js', loaded: false, children: [ { id: 'D:\\03_private\\[140728] NodeJs\\HelloWorld\\fibonaccie.js', exports: [Object], parent: [Circular], filename: 'D:\\03_private\\[140728] NodeJs\\HelloWorld\\fibonaccie.js', loaded: true, children: [], paths: [Object] } ], paths: [ 'D:\\03_private\\[140728] NodeJs\\HelloWorld\\test\\node_modules', 'D:\\03_private\\[140728] NodeJs\\HelloWorld\\node_modules', 'D:\\03_private\\[140728] NodeJs\\node_modules', 'D:\\03_private\\node_modules', 'D:\\node_modules' ] }

__filename

console.log(__filename); >>>>> D:\03_private\[140728] NodeJs\HelloWorld\test\fibonaccie-test.js

__dirname

console.log(__dirname); >>>>> D:\03_private\[140728] NodeJs\HelloWorld\test