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.

For the latest stable version:

npm install -g typescript 

For our nightly builds:

npm install -g typescript@next 

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).

• Quick tutorial
• Programming handbook
• Language specification
• Homepage

In order to build the TypeScript compiler, ensure that you have Git and Node.js installed.

Clone a copy of the repo:

git clone https://github.com/Microsoft/TypeScript.git 

Change to the TypeScript directory:

cd TypeScript 

Install Jake tools and dev dependencies:

npm install -g jake npm install 

Use one of the following to build and test:

jake local # Build the compiler into built/local jake clean # Delete the built compiler jake LKG # Replace the last known good with the built one. # Bootstrapping step to be executed when the built compiler reaches a stable state. jake tests # Build the test infrastructure using the built compiler. jake runtests # Run tests using the built compiler and test infrastructure. # You can override the host or specify a test for this command. # Use host=<hostName> or tests=<testPath>. jake runtests-browser # Runs the tests using the built run.js file. Syntax is jake runtests. Optional parameters 'host=', 'tests=[regex], reporter=[list|spec|json|<more>]'. jake baseline-accept # This replaces the baseline test results with the results obtained from jake runtests. jake lint # Runs tslint on the TypeScript source. jake -T # List the above commands. 

node built/local/tsc.js hello.ts

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

To build, do jake tsc first (this copies over some .d.ts files).

After that tsc (using tsconfig.json) should work. Same with Atom's build keybinding.

To regenerate diagnostics: jake generate-diagnostics

Initialize const preludePath in src/compiler/program.ts necessarily. (TODO: move prelude.d.ts over to this project)

Use with atom-typescript plugin version 7.1.5:

apm install atom-typescript@7.1.5