intro to node
What is Node.js?
Open-source, cross-platform runtime environment for developing server-side web applications using JavaScript on server side
What you can build with it?
- Web-chat
- Fast file upload client
- Ad server
- Any real-time data apps
- Anything
So, why node is so cool?
Event-driven
non-blocking
Asynchronous
Single thread
Callbacks
Installing node (Mac)
- brew install nvm
- nvm install node
- node -v, npm -v
- node example.js
modules
- module.exports, exports
- require()
Exercise
Starting node app
- npm init
- package.json
- npm install
- npm start
| Rails | Node.js |
|---|---|
| gem install ... | npm install ... |
| bundle (works when Gemfile is found) |
npm (works when package.json is found) |
| bundle update | npm update |
| rails s | npm start (reads it from package.json) |