Polymer includes a Web Components polyfill, so you can write raw Web Components if you want to. Polymer is really just some syntactic sugar over that (and other

Polymer includes a Web Components polyfill, so you can write raw Web Components if you want to. Polymer is really just some syntactic sugar over that (and other specs thrown in, like html imports, templates, etc). That said, these aren't really the same kind of libraries at all, so I'm not sure why this is such a x vs y thread. Ideally, react and web components are fully composable, and it doesn't really matter where the element came from.