Is it possible to associate a given language with a file extension in VSCode?

Question

Is it currently possible to associate a given language with a file extension that is not typically associated with that language?

Say I have a filetype *.foo, and I want to associate it with JavaScript for syntax highlighting. Does anyone know if this is currently possible with VSCode?

I am working in a language that is syntactically similar to Visual Basic, and want to associate it with that language type. I understand that you can assign a language after the file is opened, however this is cumbersome to do each time a file is opened.

In Sublime Text for example it is possible to select "Open all with current extension as...". Does this exist yet for VSCode?

EDIT: The Visual Studio Code team has added a proper way to add both themes and languages.

https://code.visualstudio.com/updates#_yo-code-streamlined-customizations-for-vs-code

Answer 1

VSCode v1.0 officially adds the File to Language Association feature. Add the following into .vscode/settings.json:

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

You may find more details in the Visual Studio Code 1.0.0 release notes “File to language association” section.

Answer 2

You can do it yourself: For this example I'll add the ".ino" files to the C++ plugin.

Navigate to the folder containing the corresponding plugin: C:\Users\username\AppData\Local\Code\app-0.1.0\resources\app\plugins\vs.language.cpp

Open the ticino.plugin.json file and edit contributes.language.extension. In this case, you go from:

"extensions": [ ".cpp", ".c", ".cc", ".cxx", ".h", ".hpp", ".hh"],

to

"extensions": [ ".cpp", ".c", ".cc", ".cxx", ".h", ".hpp", ".hh", ".ino" ],