@emccorson Thank you very much for response. I am using Webpack. I have seen that part in docs it, but I am not clear how to import Switch component (for example) for react that way. What would code look like?

import Switch from 'onsenui/esm/elements/ons-switch'; ???

One more question is there a way not to import all components css? Because I think this:

import 'onsenui/css/onsenui-core.css';
import 'onsenui/css/onsen-css-components.css';

is importing css for all components.

I just installed lib with intention to use it with React. After importing one component (Switch) I noticed bundle size increased by about 300kb and I see some big file onsenui.js got loaded.
Is this how this lib works, it loads whole onsenui.js even if I want to use single component?