[h0munculus]

But then syntax highlighting is off until you close and reload it, which is annoying. I usually have a terminal open to the project anyway so I just use 'touch' to create the file I want.

[jskinner]

By default, the appropriate syntax highlighting will be set on the file the first time it gets saved.

[Hovertruck]

CMD+Shift+P -> "JS" or "Py" or something sets the syntax highlighting.