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TypeScript in Visual Studio Code
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On this page there are 13 sections

TypeScript in Visual Studio Code

TypeScript is a typed superset of JavaScript that compiles to plain JavaScript. It offers classes, modules, and interfaces to help you build robust components.

Working with TypeScript in Visual Studio Code [Working with TypeScript in Visual Studio Code]

Installing the TypeScript compiler

Visual Studio Code includes TypeScript language support but does not include the TypeScript compiler, tsc. You will need to install the TypeScript compiler either globally or in your workspace to transpile TypeScript source code to JavaScript (tsc HelloWorld.ts).

The easiest way to install TypeScript is through npm, the Node.js Package Manager. If you have npm installed, you can install TypeScript globally (-g) on your computer by:

tsc --version

Another option is to install the TypeScript compiler locally in your project (npm install --save-dev typescript) and has the benefit of avoiding possible interactions with other TypeScript projects you may have.

Hello World

Let's start with a simple Hello World Node.js example. Create a new folder HelloWorld and launch VS Code.

let message: string = 'Hello World';
console.log(message);

To compile your TypeScript code, you can open the Integrated Terminal (` (Windows, Linux Ctrl+`)) and type tsc helloworld.ts. This will compile and create a new helloworld.js JavaScript file.

compiled hello world [compiled hello world]

If you have Node.js installed, you can run node helloworld.js.

run hello world [run hello world]

If you open helloworld.js, you'll see that it doesn't look very different from helloworld.ts. The type information has been removed and let is now var.

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