Webpack + React + Babel. Support for new features in browsers?

Question

JavaScript

I am using React.js.
Need Map and Set support.
Will Webpack (presets, etc.) suffice, or will Babel Polyfill and core-js still need to be included?

Answer 1

babel-preset-env , specify there those browsers that need to be supported.
It is also becoming fashionable now to support the modern version of downloading applications: https://philipwalton.com/articles/deploying-es2015...

Answer 2

you need core-js

import 'core-js/es6/map';
import 'core-js/es6/set';