Add esm build to react-router

[lishengzxc]

Hi guys,

I want to import 'react-router' with esm in browsers,
It is not clear whether the official will provide it?

like this:

<script type="module">
import React from 'https://unpkg.com/react-ecmascript@1.2.0/react.development.mjs';
import ReactDOM from 'https://unpkg.com/react-ecmascript@1.2.0/react-dom.development.mjs';
import ReactRouter from 'https://cdn/react-router.esm.js';

// ...
</script>

[TrySound]

https://unpkg.com/react-router@4.4.0-beta.6/esm/react-router.js

[lishengzxc]

@TrySound I think it can not use in browsers.

How can I get the following lib?

import createContext from 'create-react-context';
import warning from 'tiny-warning';
import _extends from '@babel/runtime/helpers/esm/extends';
import _inheritsLoose from '@babel/runtime/helpers/esm/inheritsLoose';
import { createMemoryHistory, createLocation, locationsAreEqual, createPath } from 'history';
import invariant from 'tiny-invariant';
import pathToRegexp from 'path-to-regexp';
import { isValidElementType } from 'react-is';
import _objectWithoutPropertiesLoose from '@babel/runtime/helpers/esm/objectWithoutPropertiesLoose';
import hoistStatics from 'hoist-non-react-statics';

[timdorr]

You can use the module feature of Unpkg to do this: https://unpkg.com/react-router@4.4.0-beta.6/esm/react-router.js?module