section1.1.md

Section 1.1: Installation and setup

TypeScript is a typed superset of JavaScript that compiles directly to JavaScript code. TypeScript files commonly use the .ts extension. Many IDEs support TypeScript without any other setup required, but TypeScript can also be compiled with the TypeScript Node.JS package from the command line.

Install the npm package globally

You can install TypeScript globally to have access to it from any directory.

• npm install -g typescript

Install the npm package locally

You can install TypeScript locally and save to package.json to restrict to a directory. npm install typescript --save-dev Installation channels

You can install from:

• Stable channel: npm install typescript
• Beta channel: npm install typescript@beta
• Dev channel: npm install typescript@next

Compiling TypeScript code

The tsc compilation command comes with typescript , which can be used to compile code.

• tsc my-code.ts This creates a my-code.js file.