A real contender to Electron is going to have to ship a runtime or libraries that support the DOM and all of the APIs a browser like Chrome already ships along with a Javascript engine.
Maybe if we could break those all up into cross-platform shared libraries it could be done.
It only has to support the DOM and web technologies if we decide it needs to be compatible with web technologies. That's not actually needed for a cross-platform toolkit like this.
Regarding your link, it's for JavaScript -> Android Native.
I found another project that was an Electron-compatible effort on top of Gecko. I haven't done much other searching for things based on the name, honestly Positron just popped into my head while reading the original article so I used it here.
A real contender to Electron is going to have to ship a runtime or libraries that support the DOM and all of the APIs a browser like Chrome already ships along with a Javascript engine.
Maybe if we could break those all up into cross-platform shared libraries it could be done.