If you are using something like Object.assign or Promises in your ES6/TypeScript code, you will sooner or later come across the fact that IE11 does not support them natively. In such cases, the natural way forward is to include a polyfill to get them working.
Babel has a polyfill library based on core js which has polyfills for a lot of such ES6/ES2015 features.
But you don't want to include the entire polyfill library in your application if you are only using a couple of polyfills.
Here is a handy way to include just the polyfills you need using webpack:
1) Add babel-polyfill to your dev dependencies:
2) And then include the required polyfills in your webpack config:
This will make sure that only the polyfills you need are included in your webpack bundle.
More info here:
Hope you find this useful!