Any JavaScript is valid TypeScript - JavaScript that scales.

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TypeScript lets you write JavaScript the way you really want to

Any browser. Any host. Any OS

TypeScript is a typed superset of JavaScript that compiles to plain JavaScript.

Any JavaScript is valid TypeScript.

Open Source - TypeScript is being developed on GitHub. The TypeScript compiler is implemented in TypeScript, and can be used in any JavaScript host.

The command-line TypeScript compiler can be installed as a Node.js package.

To Install just run npm install -g typescript

Then to Compile just run tsc helloworld.ts

DefinitelyTyped - The repository for high quality TypeScript type definitions

TypeScript offers support for the latest and evolving JavaScript features, including those from ECMAScript 2015 (ECMAScript 6, ES6, often referred to as "Harmony") which is the sixth major release of the ECMAScript language specification and future proposals, like async functions and decorators, to help build robust components.

These features are available at development time for high-confidence app development, but are compiled into simple JavaScript that targets ECMAScript 3 (or newer) environments.

JavaScript has been standardised in the ECMAScript language specification (Standard ECMA-262) which means ECMAScript is the "proper" name for the language commonly referred to as JavaScript.

The Sixth Edition, known as ES6 or ECMAScript 2015 was released on the .

Then in the Seventh Edition has been released, known as ECMAScript 2016 or sometimes ES2016 or ES7.

The TypeScript team has some great documentation but be sure to check out the tutorials section for a run down on working with TypeScript and

TypeScript compiles to clean, simple JavaScript code which runs on any browser, in Node.js, or in any JavaScript engine that supports ECMAScript 3 (or newer).

Working with TypeScript

We do most of our TypeScript work within Visual Studio Code and have found it to be a great working enviroment for day to day work.

The Visual Studio Code team have a good guide to getting up and running with TypeScript..

TypeScript Version 2

So the 11th of July saw the Announcement of the TypeScript 2.0 Beta and updates for tooling with regards to Visual Studio 2015 (Announcing TypeScript 2.0 Beta).

The What's new in TypeScript page on the TypeScript Wiki provides great coverage as to whats new in version 2, be sure to take a read.

TypeScript Version 3

TypeScript 3.0 was released on 30 July 2018. This blog post Announcing TypeScript 3.0 covers whats new and the journey to v3.

Visual Studio Code 1.27 now ships with TypeScript version 3.0.3

TypeScript Version 3.1 RC

13 September - Announcing TypeScript 3.1 RC - Blog Post with set up details.