cc67ce1141
* Allow special property assignments in TS But only for functions and constant variable declarations initialised with functions. This specifically excludes class declarations and class expressions, which differs from Javascript. That's because Typescript supports `static` properties, which are equivalent to property assignments to a class. * Improve contextual typing predicate Don't think it's right yet, but probably closer? * More fixes. The code is still fantastically ugly, but everything works the way it should. Also update baselines, even where it is ill-advised. * Cleanup * Remove extra whitespace * Some kind of fix to isAnyDeclarationName It's not done yet. Specifically, in TS: Special property assignments are supposed to be declaration sites (but not all top-level assignments), and I think I got them to be. (But not sure). In JS: Special property assignments are supposed to be declaration sites (but not all top-level assignments), and I'm pretty sure ALL top-level assignments have been declaration sites for some time. This is incorrect, and probably means the predicate needs to be the same for both dialects. * Add fourslash and improve isAnyDeclarationName Now JS behaves the same as TS. * Cleanup from PR comments
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:
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.
- 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
Building
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 help # 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 our roadmap.