If you have other debugger extensions installed, you need to select Node.js from the dropdown. With helloworld.ts open in the editor, press F5. Rebuild by running tsc and you should now have a helloworld.js.map in the out directory next to helloworld.js. The TypeScript compiler knows to look at your tsconfig.json for project settings and compiler options.Īdd a simple tsconfig.json that set the options to compile to ES5 and use CommonJS modules. Important: To use tsconfig.json for the rest of this tutorial, invoke tsc without input files. You can modify the TypeScript compiler options by adding a tsconfig.json file that defines the TypeScript project settings such as the compiler options and the files that should be included. So far in this tutorial, you have been relying on the TypeScript compiler's default behavior to compile your TypeScript source code. When you select a method, you then get parameter help and can always get hover information.
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When you were typing in the editor, you may have noticed IntelliSense, the smart code completions and suggestions provided by VS Code and the TypeScript language server. In VS Code, you can see that you get language features such as syntax highlighting and bracket matching. The type information has been removed and let is now var. If you open helloworld.js, you'll see that it doesn't look very different from helloworld.ts. If you have Node.js installed, you can run node helloworld.js. This will compile and create a new helloworld.js JavaScript file. To compile your TypeScript code, you can open the Integrated Terminal ( ⌃` (Windows, Linux Ctrl+`)) and type tsc helloworld.ts. let message : string = 'Hello World' console. You'll notice the TypeScript keyword let and the string type declaration. įrom the File Explorer, create a new file called helloworld.ts. Create a new folder HelloWorld and launch VS Code. Let's start with a simple Hello World Node.js example.
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You can test your install by checking the version. If you have npm installed, you can install TypeScript globally ( -g) on your computer by: npm install -g typescript The easiest way to install TypeScript is through npm, the Node.js Package Manager. You will need to install the TypeScript compiler either globally or in your workspace to transpile TypeScript source code to JavaScript ( tsc HelloWorld.ts). Visual Studio Code includes TypeScript language support but does not include the TypeScript compiler, tsc. It offers classes, modules, and interfaces to help you build robust components.
TypeScript is a typed superset of JavaScript that compiles to plain JavaScript. Configure IntelliSense for cross-compilingĮdit TypeScript tutorial in Visual Studio Code.
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