The official Nintendo 3DS and Wii U SDKs both provided an Electron-like framework that allowed games to be written with web technologies. I seem to recall that

The official Nintendo 3DS and Wii U SDKs both provided an Electron-like framework that allowed games to be written with web technologies. I seem to recall that it was discontinued at some point before the Switch? The Switch does have a WebKit browser applet that games can call to display web-based content, but it's pretty limited since JIT is disabled like you say. I've only ever seen it used for e-manuals.