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TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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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.
For the latest stable version:
npm install -g typescript
For our nightly builds:
npm install -g typescript@next
There are many ways tocontribute to TypeScript.
- Submit bugs and help us verify fixes as they are checked in.
- Review thesource code changes.
- Engage with other TypeScript users and developers onStackOverflow.
- Join the#typescript discussion on Twitter.
- Contribute bug fixes.
- Read the language specification (docx,pdf,md).
This project has adopted theMicrosoft Open Source Code of Conduct. For more information seetheCode of Conduct FAQ or contactopencode@microsoft.comwith any additional questions or comments.
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 Gulp tools and dev dependencies:
npm install -g gulpnpm 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=<hostName> or tests=<testPath>. gulp runtests-browser # Runs the tests using the built run.js file. Syntax is gulp runtests. Optional parameters 'host=', 'tests=[regex], reporter=[list|spec|json|<more>]'.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.
node built/local/tsc.js hello.ts
For details on our planned features and future direction please refer to ourroadmap.
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TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
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