x-render is an experiment with server-side rendered Custom Elements (x = cross between server and client). Each XRenderElement implements one or more of the life cycle methods defined in x-render.js.
https://x-render.appspot.com/?norender statically serves the contents of client/index.html, which means the content is rendered exclusively by the client-side library (x-render.js).
https://x-render.appspot.com/ serves a server-rendered version where each rendered element is marked by a x-rendered attribute. This attribute is removed by the client-side library (x-render.js), but the DOM is not re-rendered.
https://x-render.appspot.com/?push=style,script,data will H2 server push the specified assets.
https://x-render.appspot.com/?push=all will H2 server push the specified assets.
npm i
npm run