Javascript runtime, Non-blocking, Single thread
global, console, 타이머, __filename, __dirname, module, exports, process 등
os, path, url, querystring, crypto, util 등
웹 프레임워크 없이 node 내장 기능만을 이용하여 서버 개발
- http.createServer](https://github.com/huewilliams/node.js-by-server/blob/master/http%20server%20with%20node/velopert/create%20server/app.js)
-
html parsing
solution for node errors.