How to Run JavaScript in Visual Studio Code and Program Like a Pro

Visual Studio Code includes built-in JavaScript IntelliSense, debugging, formatting, code navigation, refactorings, and many other advanced language features. We now hope you understand how to create an environment and run JavaScript in VS Code. You may need extra extensions to work with JavaScript libraries and frameworks on this code editor. However, always keep the Visual Studio Code updated if you want to enjoy all the latest features.

I’m not sure why but without this, my task would not even appear in the command palette. Notice that I didn’t type anything in args for edge because Edge is my default browser just gave it the name of the file. (Assuming you have an index.html file in your project folder). Somewhere in your drive, create a new folder for your web app. Your webserver now will open your page in your default browser.

Deploy your application

If you want to continue using // @ts-check but are confident that these are not actual issues with your application, you have to let TypeScript know about these global variables. If you’d like to learn how to deploy your web application, check out the Deploying Applications to Azure tutorials where we show how to run your website in Azure. Open the file app.js and hover over the Node.js global object __dirname. Even more interesting, you can get full IntelliSense against the Node.js framework.

Check out our article on the best resources to learn JavaScript and polish your knowledge. The -g switch installs the Express Generator globally on your machine so you can run it from anywhere. Now that connect js to html you’ve seen VS Code in action with “Hello World”, the next section shows using VS Code with a full-stack Node.js web app. You should see “Hello World” output to the terminal and then Node.js returns.

Running JavaScript code in Visual Studio Code

If no include attribute is present, then this defaults to including all files in the containing directory and subdirectories. When a include attribute is specified, only those files are included. Most common JavaScript libraries ship with declaration files or have type declaration files available. You can now click Debug toolbar green arrow or press F5 to launch and debug “Hello World”. Your breakpoint will be hit and you can view and step through the simple application. Notice that VS Code displays a different colored Status Bar to indicate it is in Debug mode and the DEBUG CONSOLE is displayed.

You can trigger suggestions at any time by pressing ⌃Space (Windows, Linux Ctrl+Space). The CSS file links successfully to the HTML file, and there are no errors on the developer tools on Chrome. I linked the JavaScript file to the HTML file, but the alert doesn’t appear.

Exploring JavaScript Outputs:

To go to original state – Press Ctrl + K followed by M, select auto-detect. If you are happy with html only viewer, then there is no need for you to come back to the original state. You might also need to change the default port from the extension settings in case it’s already in use on your system. Over 63% of the respondents interviewed in a 2023 Stackoverflow survey said they use JavaScript.

VS Code has an integrated terminal which you can use to run shell commands. You can run Node.js directly from there and avoid switching out of VS Code while running command-line tools. To test that you have Node.js installed correctly on your computer, open a new terminal and type node –version and you should see the current Node.js version installed.

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This page summarizes the JavaScript features that VS Code ships with. Extensions from the VS Code Marketplace can augment or change most of these built-in features. For a more in-depth guide on how these features work and can be configured, see Working with JavaScript.

You can read more about using custom data in the vscode-custom-data repository. Emmet abbreviations are listed along with other suggestions and snippets in the editor auto-completion list. Our configs are nearly identical save a single property — that property being, the group property.

JSX and auto closing tags

This tells the compiler to create synthetic default members and you get IntelliSense. React Native uses Babel behind the scenes to create the proper run-time code with default members. If you also want to do debugging of React Native code, you can install the React Native Extension. Automatic imports speed up coding by suggesting available variables throughout your project and its dependencies. When you select one of these suggestions, VS Code automatically adds an import for it to the top of the file.

• This tells the compiler to create synthetic default members and you get IntelliSense.
• Return type inlay hints show the return types of functions that don’t have an explicit type annotation.
• You can read more about how TypeScript uses JSDoc for JavaScript type checking in Working with JavaScript.

However, some JavaScript features will need extensions to execute. This code editor also supports TypeScript, a superscript of JavaScript that introduces types. Visual Studio Code supports JavaScript, among many other languages. The easiest way to enable type checking in a JavaScript file is by adding // @ts-check to the top of a file.

Also notice that VS Code knows that msg is a string based on the initialization to ‘Hello World’. You’ll see IntelliSense showing all of the string functions available on msg. IntelliSense on the console object was automatically presented to you. CSS plays a pivotal role in enhancing the visual appeal of websites, infusing them with style and charm. In the realm of frontend development, your role revolves around crafting visually appealing websites that not only captivate but also… Creating an HTML file within Visual Studio Code lays the foundation for integrating JavaScript seamlessly into web projects.