1^st Practical Class:
Hello, React!

(un-slides about React)

App Setup

React: UI = f(data)

React - UI library

JS: Arrow Function

JS: someArray.map()

useState Hook

Declarative vs. Imperative (code)

Imperative

Declarative

Declarative vs. Imperative

• Imperative
  • explicit instructions
  • system is stupid, you are smart
• Declarative
  • describe the outcome
  • system is smart, you don't care