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104 lines
5.1 KiB
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104 lines
5.1 KiB
Text
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# TypeScript
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[](https://github.com/microsoft/TypeScript/actions?query=workflow%3ACI)
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[](https://dev.azure.com/typescript/TypeScript/_build?definitionId=7)
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[](https://www.npmjs.com/package/typescript)
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[](https://www.npmjs.com/package/typescript)
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[TypeScript](https://www.typescriptlang.org/) 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](https://www.typescriptlang.org/play/), and stay up to date via [our blog](https://blogs.msdn.microsoft.com/typescript) and [Twitter account](https://twitter.com/typescript).
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Find others who are using TypeScript at [our community page](https://www.typescriptlang.org/community/).
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## Installing
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For the latest stable version:
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```bash
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npm install -g typescript
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```
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For our nightly builds:
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```bash
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npm install -g typescript@next
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```
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## Contribute
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There are many ways to [contribute](https://github.com/microsoft/TypeScript/blob/main/CONTRIBUTING.md) to TypeScript.
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* [Submit bugs](https://github.com/microsoft/TypeScript/issues) and help us verify fixes as they are checked in.
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* Review the [source code changes](https://github.com/microsoft/TypeScript/pulls).
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* Engage with other TypeScript users and developers on [StackOverflow](https://stackoverflow.com/questions/tagged/typescript).
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* Help each other in the [TypeScript Community Discord](https://discord.gg/typescript).
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* Join the [#typescript](https://twitter.com/search?q=%23TypeScript) discussion on Twitter.
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* [Contribute bug fixes](https://github.com/microsoft/TypeScript/blob/main/CONTRIBUTING.md).
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* Read the archived language specification ([docx](https://github.com/microsoft/TypeScript/blob/main/doc/TypeScript%20Language%20Specification%20-%20ARCHIVED.docx?raw=true),
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[pdf](https://github.com/microsoft/TypeScript/blob/main/doc/TypeScript%20Language%20Specification%20-%20ARCHIVED.pdf?raw=true), [md](https://github.com/microsoft/TypeScript/blob/main/doc/spec-ARCHIVED.md)).
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This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/). For more information see
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the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact [opencode@microsoft.com](mailto:opencode@microsoft.com)
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with any additional questions or comments.
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## Documentation
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* [TypeScript in 5 minutes](https://www.typescriptlang.org/docs/handbook/typescript-in-5-minutes.html)
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* [Programming handbook](https://www.typescriptlang.org/docs/handbook/intro.html)
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* [Homepage](https://www.typescriptlang.org/)
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## Building
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In order to build the TypeScript compiler, ensure that you have [Git](https://git-scm.com/downloads) and [Node.js](https://nodejs.org/) installed.
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Clone a copy of the repo:
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```bash
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git clone https://github.com/microsoft/TypeScript.git
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```
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Change to the TypeScript directory:
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```bash
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cd TypeScript
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```
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Install [Gulp](https://gulpjs.com/) tools and dev dependencies:
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```bash
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npm install -g gulp
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npm ci
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```
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Use one of the following to build and test:
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```
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gulp local # Build the compiler into built/local.
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gulp clean # Delete the built compiler.
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gulp LKG # Replace the last known good with the built one.
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# Bootstrapping step to be executed when the built compiler reaches a stable state.
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gulp tests # Build the test infrastructure using the built compiler.
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gulp runtests # Run tests using the built compiler and test infrastructure.
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# You can override the specific suite runner used or specify a test for this command.
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# Use --tests=<testPath> for a specific test and/or --runner=<runnerName> for a specific suite.
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# Valid runners include conformance, compiler, fourslash, project, user, and docker
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# The user and docker runners are extended test suite runners - the user runner
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# works on disk in the tests/cases/user directory, while the docker runner works in containers.
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# You'll need to have the docker executable in your system path for the docker runner to work.
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gulp runtests-parallel # Like runtests, but split across multiple threads. Uses a number of threads equal to the system
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# core count by default. Use --workers=<number> to adjust this.
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gulp baseline-accept # This replaces the baseline test results with the results obtained from gulp runtests.
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gulp lint # Runs eslint on the TypeScript source.
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gulp help # List the above commands.
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```
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## Usage
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```bash
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node built/local/tsc.js hello.ts
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```
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## Roadmap
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For details on our planned features and future direction please refer to our [roadmap](https://github.com/microsoft/TypeScript/wiki/Roadmap).
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