Building Enterprise JavaScript Applications

The env preset

However, in the previous approach, you have to manually keep track of which ECMAScript features you've used, and determine whether they are compatible with the version of Node.js you have installed on your machine. Babel provides a better alternative, the env preset, which is available as the @babel/preset-env package. This preset will use the kangax ECMAScript compatibility tables (kangax.github.io/compat-table/) to determine which features are unsupported by your environment, and download the appropriate Babel plugins.

This is great for our use case, because we don't want to transpile everything into ES5, only the import/export module syntax. Using the env preset will ensure that only the minimum number of transformations ...