Running

Run backend before frontend.

Backend:

• install latest Go
• run from command line: go run backend-golang/main.go

Frontend:

• just open frontend-javascript/index.html in a web browser
• to login:
  • check the backend-golang/db/users.json
  • input the existing username (testuser)
  • input the existing password (1234)
  • click the Login link (pressing Enter won't trigger login)

Warning

Don't use this in production

Backend side:

• doesn't have proper error handling (to make logic clearer)
• allows CORS (to enable connecting in localhost)
• doesn't encrypt or validate password
• is very unoptimized
• doesn't guard type assertion (type casting)

Frontend side:

• is not asynchronous (request to backend may cause hang because synchronous request blocks the UI)