/andy-typescript

Primary LanguageTypeScript

This is notes on typescript based off Andys lecture.

What is Typescript?

  • Superset of Javascript
  • All JS is valid TS
  • JS with static typing

scss => sass transpiler => css

Node does not understand TS, so we need a compiler to turn it into JS ts => typescript transpiler => js

Benefits

  • Only accepts what you tell it to accept.
  • Won't compile if what you input is not correct

Download

  • npm i -g typescript
  • tsc -v will check typescript version

Changing the default language to ES6

  • tsc 01_basics.ts --target es2016

Creating a Typescript json file

  • Make sure its on the top level floor

  • type tsc --init

  • outDir - determines where all of the js files will be outputed

  • run tsc on any level to compile code

  • Typically, gitignore the build files

tsc --watch

This will automatically compile new js file when we save or make new tsc files

Using in React

  • npx create-react-app my-app --template typescript to create react app with typescript