Semantic Coherence: TypeScript – Signal Evidence & AI Readability

[H1] TypeScript is JavaScript with syntax for types.
TypeScript is a strongly typed programming language that builds on JavaScript, giving you better tooling at any scale.Try TypeScript NowOnline or via npmEditor ChecksAuto-completeInterfacesJSX
tsconst user = { firstName: "Angela", lastName: "Davis", role: "Professor",}

[H1] Download TypeScript
TypeScript can be installed through three installation routes depending on how you intend to use it: an npm module, a NuGet package or a Visual Studio Extension.If you are using Node.js, you want the npm version. If you are using MSBuild in your project, you want the NuGet package or Visual Studio extension.
[H2] TypeScript in Your Project
Having TypeScript set up on a per-project basis lets you have many projects with many different versions of TypeScript, this keeps each project working consistently.
[H3] via npm
TypeScript is available as a package on the npm registry available as "typescript".You will need a copy of Node.js as an environment to run the package. Then you use a dependency manager like npm, yarn or pnpm to download TypeScript into your project.npm install typescript --save-devnpm yarn pnpmAll of these dependency managers support lockfiles, ensuring that everyone on your team is using the same version of the language. You can then run the TypeScript compiler using one of the following commands:npx tscnpm yarn pnpm
[H3] with Visual Studio
For most project types, you can get TypeScript as a package in Nuget for your MSBuild projects, for example an ASP.NET Core app.When using Nuget, you can install TypeScript through Visual Studio using:The Manage NuGet Packages window (which you can get to by right-clicking on a project node)The Nuget Package Manager Console (found in Tools > NuGet Package Manager > Package Manager Console) and then running:Install-Package Microsoft.TypeScript.MSBuildFor project types which don't support Nuget, you can use the TypeScript Visual Studio extension. You can install the extension using Extensions > Manage Extensions in Visual Studio.The examples below are for more advanced use cases.
[H2] Globally Installing TypeScript
It can be handy to have TypeScript available across all projects, often to test one-off ideas. Long-term, codebases should prefer a project-wide installation over a global install so that they can benefit from reproducible builds across different machines.
[H3] via npm
You can use npm to install TypeScript globally, this means that you can use the tsc command anywhere in your terminal.To do this, run npm install -g typescript. This will install the latest version (currently 6.0).
[H3] via Visual Studio Marketplace
You can install TypeScript as a Visual Studio extension, which will allow you to use TypeScript across many MSBuild projects in Visual Studio.The latest version is available in the Visual Studio Marketplace.
[H2] Working with TypeScript-compatible transpilers
There are other tools which convert TypeScript files to JavaScript files. You might use these tools for speed or consistency with your existing build tooling.Each of these projects handle the file conversion, but do not handle the type-checking aspects of the TypeScript compiler. So it's likely that you will still need to keep the above TypeScript dependency around, and you will want to enable isolatedModules.
[H3] Babel
Babel is a very popular JavaScript transpiler which supports TypeScript files via the plugin @babel/plugin-transform-typescript.
[H3] swc
swc is a fast transpiler created in Rust which supports many of Babel's features including TypeScript.
[H3] Sucrase
Sucrase is a Babel fork focused on speed for using in development mode. Sucrase supports TypeScript natively.
[H2] Next Steps
[H4] Get Started
JS to TSNew to ProgrammingOOP to JSFunctional to JSInstallation
[H4] Handbook
Everyday TypesCreating Types from TypesObject TypesVariable DeclarationsMore on Functions
[H4] Tools
PlaygroundTSConfig Reference
[H4] Release Notes
What's upcoming in 6.0?What's new in 6.0
[H4] Tutorials
ASP.NETMigrating from JSWorking with the DOMReact & Webpack

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[H1] Connect with us
[H2] Online
Tell us what’s working well, what you want to see added or improved, and find out about new updates.
[H3] Stack Overflow
Engage with your peers and ask questions about TypeScript using the tag 'typescript'
[H3] Chat
Chat with other TypeScript users in the TypeScript Community Chat.
[H3] GitHub
Found a bug, or want to give us constructive feedback? Tell us on GitHub
[H3] Twitter
Stay up to date. Follow us on Twitter @typescript!
[H3] Blog
Learn about the latest TypeScript developments via our blog!
[H3] Definitely Typed
TypeScript definition files. Browse the thousands of available for common libraries and frameworks.
[H2] Connect in person
[H3] Conferences
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[H4] TSConf:EU
Linz AustriaMarch 31st, 2020
[H2] Conferences
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