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TypeScript tutorial in Visual Studio Code
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On this page there are 9 sections

TypeScript tutorial 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.

Install 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

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.

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

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.

{ "compilerOptions": { "target": "ES5", "module": "CommonJS" } }

When editing tsconfig.json, IntelliSense (⌃Space (Windows, Linux Ctrl+Space)) will help you along the way.

By default, TypeScript includes all the .ts files in the current folder and subfolders if the files attribute isn't included, so we don't need to list helloworld.ts explicitly.

Change the build output

Having the generated JavaScript file in the same folder as the TypeScript source will quickly get cluttered on larger projects, so you can specify the output directory for the compiler with the outDir attribute.

{ "compilerOptions": { "target": "ES5", "module": "CommonJS", "outDir": "out", "sourceMap": true } }

Rebuild by running tsc and you should now have a helloworld.js.map in the out directory next to helloworld.js.

With helloworld.ts open in the editor, press F5. If you have other debugger extensions installed, you need to select Node.js from the dropdown.

The debugger will start a session, run your code, and display the "Hello World" message in the Debug console panel.

In helloworld.ts, set a breakpoint by clicking on the left gutter of the editor. You will see a red circle if the breakpoint is set. Press F5 again. Execution will stop when the breakpoint is hit and you'll be able to see debugging information such as variable values and the call stack in the Run and Debug view (⇧⌘D (Windows, Linux Ctrl+Shift+D)).

See Debugging TypeScript to learn more about VS Code's built-in debugging support for TypeScript and how you can configure the debugger for your project scenarios.

Next steps

This tutorial was a quick introduction to using VS Code for TypeScript development. Read on to learn more about using VS Code's compiling and debugging support for TypeScript:

Common questions

Cannot launch program because corresponding JavaScript cannot be found

You've likely not set "sourceMap": true in your tsconfig.json and the VS Code Node.js debugger can't map your TypeScript source code to the running JavaScript. Turn on source maps and rebuild your project.

5/13/2026