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This debug code was added quite a while ago, constructed such that we wouldn't have to ship this code to our users. However, this is the sole place in the compiler project where the ts namespace "escapes" the bundle. By moving this debug code into the compiler itself, we no longer have any references to the ts namespace itself for our bundles that don't export anything (tsc, typingsInstaller). This lets bundlers tree shake the compiler, reducing the size of our output by _5.7 MB_ (a ridiculous improvement for _adding_ code).
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.
Find others who are using TypeScript at our community page.
Installing
For the latest stable version:
npm install -g typescript
For our nightly builds:
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.
- Help each other in the TypeScript Community Discord.
- Join the #typescript discussion on Twitter.
- Contribute bug fixes.
- Read the archived 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
Roadmap
For details on our planned features and future direction please refer to our roadmap.