Add module

ES Modules used correctly reduce global pollution, dependency conflicts, and transport requests. Used correctly, they can also provide multi-version support for code consumers.

**Also see:** *[import](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import)* and *[export](https://developer.mozilla.org/en-US/docs/web/javascript/reference/statements/export).*