Language mode-specific key binding?

I’d like to map a keybinding for a specific language mode. Specifically, I’d like to map j to gj, as shown in the README, but only for Markdown.

I’ve tried a couple variants of the when clause using, for example, resourceLangId == markdown, but since that’s used for mappings (and not settings) it doesn’t seem to be an option.

Is what I’m trying to do even possible? I have several custom filetype mappings in Vim and would like to carry that approach over to VSCode.

[adipurnama]

adding editorLangId == <file_type> at when clause seems to be working now.

e.g.

  "vim.normalModeKeyBindingsNonRecursive": [
     ...
     {
	"before": [ "t", "t" ],
	"commands": [ "testing.runAtCursor" ],
	"when": "editorLangId != go && editorTextFocus && !inReferenceSearchEditor && !isInEmbeddedEditor",
     },
     {
	"before": [ "t", "t" ],
	"commands": [ "go.test.cursor" ],
	"when": "editorLangId == go  && editorTextFocus && !inReferenceSearchEditor && !isInEmbeddedEditor",
     },
     ...
   ]

[jeremyjh]

@jpoon you can get the file name though right? This would allow for people to have ftdetect style bindings. It is surprising this would not be on the roadmap for a vim emulator.