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TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

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TypeScript

Join the chat at https://gitter.im/Microsoft/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 theplayground, and stay up to date viaour blog andTwitter account.

Installing

For the latest stable version:

npm install -g typescript

For our nightly builds:

npm install -g typescript@next

Contribute

There are many ways tocontribute to TypeScript.

Documentation

Building

In order to build the TypeScript compiler, ensure that you haveGit andNode.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 jakenpm 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.

Usage

node built/local/tsc.js hello.ts

Roadmap

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

About

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

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