Run things in this order to start

npm i

npx cap sync

Now whenever you want to test run this

Web

npm start

Android

npm run build

npx cap sync

npx cap open android

IOS

npm run build

npx cap sync

npx cap open ios

Electron

npm run build

npx cap sync

npx cap open @capacitor-community/electron

Packaging

Electron

npm run build

npx cap sync

npm install electron-packager -g

electron-packager X:\code\captest\electron MAshkif --platform=win32 --arch=x64