TypeScript




TypeScript is a language for application-scale JavaScript. TypeScript adds optional types to JavaScript that support 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.

Installing

For the latest stable version:

``bash
npm install -g typescript
`

For our nightly builds:

`bash
npm install -g typescript@next
`

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, md).

This project has adopted the Microsoft Open Source Code of Conduct. For more information see
the Code of Conduct FAQ or contact opencode@microsoft.com
with any additional questions or comments.

Documentation

* Quick tutorial
* Programming handbook
* Language specification
* Homepage

Building

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

Clone a copy of the repo:

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

Change to the TypeScript directory:

`bash
cd TypeScript
`

Install Gulp tools and dev dependencies:

`bash
npm install -g gulp
npm install
`

Use one of the following to build and test:

`
gulp local # Build the compiler into built/local
gulp clean # Delete the built compiler
gulp LKG # Replace the last known good with the built one.
# Bootstrapping step to be executed when the built compiler reaches a stable state.
gulp tests # Build the test infrastructure using the built compiler.
gulp runtests # Run tests using the built compiler and test infrastructure.
# You can override the host or specify a test for this command.
# Use --host= or --tests=.
gulp baseline-accept # This replaces the baseline test results with the results obtained from gulp runtests.
gulp lint # Runs tslint on the TypeScript source.
gulp help # List the above commands.
`

Usage

`bash
node built/local/tsc.js hello.ts
``

Roadmap

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