TypeScript

TypeScript is a language for application-scale JavaScript. TypeScript adds optional types, classes, and modules to JavaScript. TypeScript supports tools for large-scale JavaScript applications for any browser, for any host, on any OS. TypeScript compiles to readable, standards-based JavaScript. Try it out at the playground, and stay up to date via our blog and twitter account.

Installation

npm install -g typescript

Usage

tsc hello.ts

Contribute

There are many ways to contribute to TypeScript.

• Submit bugs and help us verify fixes as they are checked in.
• Review the source code changes.
• Engage with other TypeScript users and developers on StackOverflow.
• Join the #typescript discussion on Twitter.
• Contribute bug fixes.
• Read the language specification (docx, pdf).

Documentation

• Quick tutorial
• Programming handbook
• Language specification
• Homepage

Building

1. Install node if you haven't already
2. Install dependencies (Jake, mocha, Chai and browserify the tool we use to build our compiler. To do this, run npm install.
3. To use jake, run one of the following commands:
   • jake local - This builds the compiler. The output is in built/local in the public directory
   • jake clean - deletes the build compiler
   • jake LKG - This replaces the LKG (last known good) version of the compiler with the built one.
     • This is a bootstrapping step to be executed whenever the built compiler reaches a stable state.
   • jake tests - This builds the test infrastructure, using the built compiler.
   • jake runtests - This runs the tests, using the built compiler and built test infrastructure.
     • You can also override the host or specify a test for this command. Use host= or tests=.
   • jake baseline-accept - This replaces the baseline test results with the results obtained from jake runtests.
   • jake -T lists the above commands.

Roadmap

For details on our planned features and future direction please refer to our roadmap.