ELICE Month 2 - TypeScript-NodeJs-MongoDB

Log for studying TypeScript, Node.js and MongoDB.

• This will be the fundamental basis of the first ELICE web project supposed to be 5/23~6/5.

The subject that will be inspected would be as followed:

• Week 1: TypeScript, Interface, Generic, Decorator
• Week 2: Node.js, Express.js, REST API, Mongoose, Mongo DB and Relational DB
• Week 3: Implementation of functions such as sign in, sign up and API server.

1. TypeScript

Why do we need TypeScript instead of JavaScript?

• Primitive Types

Array, Tuple, Enum, Any, Void

• Interface & Generic

Optional Property, Readonly Property etc

2. NodeJS

Javascript can do more than client side programming!

• JS in Web Browser for Rich Internet Application
• Single Thread vs Multi Thread
• Blocking vs Non-Blocking

NodeJS is a revolutionary platform for Javascript

• JS is now able to program server side!
• JavaScript Runtime & NodeJS
• ES6 & JavaScript Asynchronous Function

Async & Await, Promise, Callback Hell

• Modules & CommonJS

Node Package Manager and ExpressJS

• 3 Layer Architecture

- Controller (API Layer)
- Service Layer
- Model Layer (Data Access Layer)

3. MongoDB

All application use DB to CRUD data.

• Relational DBM is not enough.

NoSQL is light and able to treat more complicated big data compare to SQL

• MongoDB & Mongoose
• MongoDB Local & Atlas

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