Take a look at Declarative Shadow DOM: https://github.com/mfreed7/declarative-shadow-dom https://github.com/mfreed7/declarative-shadow-dom This is basically the

Take a look at Declarative Shadow DOM: https://github.com/mfreed7/declarative-shadow-dom https://github.com/mfreed7/declarative-shadow-dom This is basically the SSR spec for web components.