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That's not what SSR means. SSR means that server-rendered HTML gets hydrated, without modification, to add interactivity. You're rendering a server-rendered page and then blowing it away and replacing it with a client-rendered page, undermining your performance gains.
P.S. I pulled down the feature/router branch and ran it with JS disabled. The page is blank. This isn't SSR… not even close.
Server side rendering means generating html on the server, that is all. What you are describing is how server-side rendering works in React, but how server-side rendering is handled in React does not define how server-side rendering is done everywhere.
The Lighthouse score on my personal site which uses a modified version of this SSR technique would disagree with your performance assessment. The site only takes a slight hit to performance because of the cheap server the site is hosted on, otherwise it would be 100%.
When you pulled down the branch, did you also run the node server? Something sounds amiss.
Pulled down the feature/router branch and noticed a bug with Parcel. I also updated the example so it should work out of the box now. Example is a year old, just needed a little maintenance. There seems to be some issues with styling, but that could be fixed.
web.dev/declarative-shadow-dom/ @steveblue
dev-to-uploads.s3.amazonaws.com/up...
Yes, Declarative Shadow DOM is still only available in Chrome AFAIK.
Although if I were to SSR WC today I would use Declarative Shadow DOM and tooling provided by Lit, polyfill the rest of the browsers.
New blog post here uses @lit-labs/ssr instead, way better solution IMHO.
dev.to/steveblue/server-side-rende...
Good catch! That's a bug in the library I used for WC Readymade. It can be replicated when there are no styles specified. Not a bug in SSR. Styles are rendered fine. Maybe I’ll update the example in the near future to demo styling too.
Updated with fixed example.
Wonderful article @steveblue . I am trying to get this working with LitElement but I'm unable to pre-render the shadow DOM. Do you think it is possible to achieve that?
Thanks @steve for a great writeup.
I learned a lot. Thank you.
Superb article , i use github.com/popeindustries/lit-html... to ssr webcomponents , cleanly works on all environments browser, server even sw.
Lately Lit SSR is achieving new ways to do SSR:
lit.dev/docs/ssr/overview/
Yeah, I've been meaning to make a follow up blog post. I also have a workshop in the works for SSR with @lit-labs/ssr.