emacs-ng cites Deno, which speaks to your "more mainstream" as well as some of the sandboxing concerns offered by others https://github.com/emacs-ng/emacs-ng#de

emacs-ng cites Deno, which speaks to your "more mainstream" as well as some of the sandboxing concerns offered by others https://github.com/emacs-ng/emacs-ng#denojavascript https://github.com/emacs-ng/emacs-ng#denojavascript