Enabling custom file extensions for JavaScript IntelliSense in VS Code: A step-by-step guide

The title of this query reveals my predicament. In our organization, we employ an unconventional file extension for source code written in JavaScript. It appears that switching the file extension to ".js" triggers IntelliSense.

My curiosity lies in whether IntelliSense can be activated with the non-standard file extension.

Answer №1

To switch the language to JavaScript in your current session, click on the "Plain Text" or the detected language name at the bottom right of the window. This will open a menu at the top where you can make the change and set that specific extension to always be recognized as JS. https://i.sstatic.net/qwWX1.png https://i.sstatic.net/mfDtM.png

Answer №2

To change the file association for a specific extension in Visual Studio Code, you can use the files.associations setting:

"files.associations": {
  "*.customExtension": "javascript"
}

Answer №3

According to information from this thread (discovered through a search online), it appears that the TypeScript language service does not accommodate non-standard file extensions, therefore advanced features like type-based completions (referred to as IntelliSense) may not be available. The suggestions provided by other users might help with basic syntax highlighting.

Answer №4

For those seeking this feature for a plugin, they can incorporate the following code snippet in their package.json files:

"contributes": {
  "languages": [
    {
      "id": "javascript",
      "extensions": [
        ".myext"
      ]
    }
  ],
}

This specifies a file extension called myext that will be recognized as javascript, which is useful for enhancing intellisense in virtual files.

https://code.visualstudio.com/api/references/contribution-points#contributes.languages https://code.visualstudio.com/api/extension-guides/virtual-documents

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