From Angular 2 doc
Polyfills should be bundled separately from the application and vendor bundles. Add a polyfills.ts like this one to the src/ folder.
https://angular.io/docs/ts/latest/guide/webpack.html#!#polyfills
entry: {
'polyfills': './src/polyfills.ts',
'vendor': './src/vendor.ts',
'app': './src/main.ts'
}
https://angular.io/docs/ts/latest/guide/webpack.html#!#common-configuration
From Ionic 2 webpack.config.js
`entry: process.env.IONIC_APP_ENTRY_POINT`
What should I do to load my pollyfill.ts and not break Ionic 2?