Getting started with JavaScript and TypeScript

Download and install JetBrains Toolbox

• Download and install JetBrains Toolbox.

  For macOS, you can also download the installer that matches your processor type: Apple Silicon or Intel. Ensure you select the correct option based on your system's processor.

Download and install JetBrains Fleet

• In JetBrains Toolbox, click Install next to the JetBrains Fleet icon.

  

Open a workspace

1. Press ⌘ O or select File | Open from the main menu.

2. In the file browser, navigate to an empty folder where you want to store your code, then click Open.

When you open a directory, it becomes the root of a workspace. You can view its contents in the Files view.

Configure a Node.js interpreter

1. Press ⌘ , and switch to the tab with the project settings. The tab is usually named after the folder where the project is located.

2. In the Toolchains | Node.js section, click the drop-down list, and do one of the following:

   • Select one of the detected Node.js interpreters

   • Click Add Node.js Interpreter, and then specify the path to the Go SDK directory.

   

Create project files

1. In the Files view, right-click the root folder, then select New File. Name the new file app.js.

2. Paste the following code into the editor:

   const http = require('http'); const hostname = '127.0.0.1'; const port = 3000; const server = http.createServer((req, res) => { res.statusCode = 200; res.setHeader('Content-Type', 'text/plain'); res.end('Hello World'); }); server.listen(port, hostname, () => { console.log(`Server running at http://${hostname}:${port}/`); });

3. In the Files view, right-click the root folder, then select New File. Name the file package.json.

4. Paste the following code into the editor:

   { "name": "server", "version": "1.0.0", "scripts": { "start": "node app.js" } }

Enable Smart Mode

• In the top-right corner of the window, click Smart Mode, then Enable.

  After you click the Enable button, you may have to wait for some time, while the backend is being prepared.

  

Use quick-fixes and intention actions

• Press ⌥ ⏎ to access actions that Fleet suggests in the current context.

  Solve problems using quick-fixes:

  

  Improve your code using intention actions:

  

Refactor code

• Place the caret at a symbol you want to rename. Press ⌃ R and give it a new name.

  

  The symbol gets the new name and all its usages are updated.

Navigate the codebase

• Navigate to a symbol’s declaration by pressing ⌘ B.

• Use code interlines to navigate to usages.

  

• Navigate between errors using ⌘ E and ⌘ ⇧ E.

  

• Navigate to your package.json file and click the Run icon in the gutter next to the start script and select Run 'start'.

  The application output will be shown in the console:

  

1. To install Prettier, open the built-in Terminal (View | Terminal) and run one of the following commands:

   npm install --save-dev --save-exact prettier
   npm install --global prettier

   For more information about installation options, visit the official Prettier website.

2. You can use Prettier to reformat either an entire file or a selected code fragment:

   • To reformat an entire file, right-click the file and select Reformat Code from the context menu.

   • To reformat a code fragment, select it and then choose Reformat Code from the context menu.