This extension is not in the VS Code marketplace yet, as it's pretty rough right now. However, the fast and furious can try an early VSIX 0.0.10. It will save you time already.
This extension adds support for converting HTML to Elmish code. It is a fork of vscode-html-elm.
- Select some text that is valid HTML code
cmd+shift+pto view the Command Palette- Type:
html convert to elmish - Select the command and hit return