module: {
loaders: [
{ test: require.resolve("react"), loader: "expose?React" }
]
}
The require.resolve is a node.js call (unrelated to require.resolve in webpack
processing -- check the node.js docs instead). require.resolve gives you the
absolute path to the module ("/.../app/node_modules/react/react.js"). So the
expose only applies to the react module. And it's only exposed when used in the
bundle.