NodeJS/TypeScript/Express

Terms

• Web Server - any application listen and accept HTTP request and send back HTTP response.
• Route - part of the URL and the HTTP method that point to specific end-point function

Tools

• ts-node a tool to run TypeScript in NodeJS.
• ts-node-dev a tool to watch and run typescript apps.
• express web framework
• mocha tests runner
• chai asserts library
• supertest express route assert library
• ts-mock-imports mocking utility

Configuration

tsconfig

• baseUrl compile all TypeScript files under this directory
• esModuleInterop make sure we can import CommonJS as ESM in TypeScript

Content

Entry Point

index.ts is our application entry point. Any async operation should be done at this point.

app.ts the express application (top level router).

config application configuration module.

db postgres connection module