My notes learning TypeScript
TypeScript documentation can be found here.
TypeScript playground can be found here.
Install the latest stable release of Node.js
If already installed, check the version by running command: node -v
Node version should be > 18 at the time of this file creation
This will also install the node package manager (npm)
Check the npm version by running command: npm -v
Node package manger version should be > 9.2 at the time of this file creation
Create folder structure for project
Example: /LearningThings/LearningTypeScript
Create a package file in project folder (package.json)
Run command: npm init
This will create a package.json file, can use defaults for now
Install TypeScript globally: npm i -g typescript
Check version globally: tsc -v or npx tsc -v
Install TypeScript to local project (from project folder): npm i typescript --save-dev
Check version locally: npm ls typescript or npx tsc -v
(npx is the Node Package Executor)
Create a TypeScript config file (tsconfig.json)
Run command: npx tsc --init
This will create a tsconfig.json file
Use defaults for now, but can change JavaScript target version and other configurations.
Create a TypeScript file, Ex. TestTypeScript.ts
Add some basic JavaScript code as a test script
Example:
let fakeString = 'Fake String';
console.log(fakeString);
Compile the script which will generate a TestTypeScript.js JavaScript file
Run command: npx tsc
Run TestTypeScript.js file
Run command: node testtypescript