TypeScript_Notes

Description: Notes about TypeScript

Compile TypeScript

• If you don't have TypeScript installed in local project

  • npx tsc fileName.ts
  • This file gets converted to a JS file
  • Before that happends, TS checkes file for errors
  • Most errors will be seen in IDE before compilation

• Typescript info

  • Generic type only works in conjunction with another type (the connected type). You add the other type in the angle brackets

• React with Typescript

  • Typescript compilation will be part of build process for React (since react uses JSX which has to be converted to JS)

• What to add types for in React

  • Props
  • If using arrow function to define component, you can also use the FC type.
  • State
  • Functions defined in your component