## Introductory

- [Intro](https://nodejs.org/en/about/)
- [Blocking VS Non-Blocking](https://nodejs.org/en/docs/guides/blocking-vs-non-blocking/)
- [Callbacks](https://nodejs.org/en/knowledge/getting-started/control-flow/what-are-callbacks/)
- On top of callbacks there are (introduced in later versions of node or through libraries, see [bluebird](http://bluebirdjs.com/docs/getting-started.html) for previous):
  - [Promises](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise) introduced in ES6.
  - [Async/await](https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Asynchronous/Async_await)


## Appendix

### Web server
- Popular http server [expressjs](https://expressjs.com/)
- Lean (personal preference) [koajs](https://koajs.com/)

### Testing
- Popular testing framework in community [mochajs](https://mochajs.org/)
- Lean testing framework (personal preference) [tapejs](https://github.com/substack/tape)