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fc10eb75a6
* do not format comma/closeparen in jsxelement * format jsx expression * make rules optional * Remove upper boilerplate from issue template Our issue stats did not improve appreciably when we added the issue template. Reduce upper boilerplate text and try to make it more action-oriented * Update issue_template.md * new options should be optional for compatibility * Add getCurrentDirectory to ServerHost * Add nullchecks for typeRoots, remove getCurrentDirectory from ServerHost as it is always the installation location * VarDate interface and relevant Date.prototype members * Fix 9363: Object destructuring broken-variables are bound to the wrong object (#9383) * Fix emit incorrect destructuring mapping in var declaration * Add tests and baselines * Add additional tests and baselines * Fix crash in async functions when targetting ES5. When targetting ES5 and with --noImplicitReturns, an async function whose return type could not be determined would cause a compiler crash. * Add This type to lib * getVarDate should be on the Date interface * Don't emit source files found under node_modules * Destructuring assignment removes undefined from type when default value is given * Add nullcheck when calculating indentations for implort clause * Add test * Dont load JavaScript if types packages are present * Renamed API * Use checkExpression, not checkExpressionCached * Show "<unknown>" if the name of a declaration is unavailable * Parse `export default async function` as a declaration * Removed one error to avoid full path issues * Fix incorrectly-saved quote symbols in ThirdPartyNoticeText.txt |
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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 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).
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 Gulp tools and dev dependencies:
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=<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.
Usage
node built/local/tsc.js hello.ts
Roadmap
For details on our planned features and future direction please refer to our roadmap.