Why would you package it in Electron? AFAIK, webassembly is mainly intended to be run on the web, in the browser. The main goal being you don't need to install anything.
Building a native app to wasm to package it into Electron sounds really weird to me. OK there's a security benefit thanks to sandboxing, but using Electron as a sandbox is really a strange idea.
And when it comes to portability, if you build you native app to webassembly, it can run anywhere. But if you add Electron to the mix, you need to build a different version for each platform, which destroy the portability benefit. If your app can be built on wasm, it can probably be compiled for different platform already. Adding Electron to the mix doesn't change any of that.
