Let me post a quick update for the Shadow DOM spec: https://w3c.github.io/webcomponents/spec/shadow/
I've almost done the spec work for Shadow DOM v1. I think it's time to be reviewed and get feedback. I hope that a browser vendor, including me, can start to implement it based on the current spec. You might want to use https://github.com/w3c/webcomponents/issues/289 to give me feedback. Please feel free to file a new issue if preferred. What's changed? - Looks at the commits in the last month [1]. Most changes are for the *slots* proposal. I think the current spec has a processing equivalent to the proposal, that's my intention. Disclaimer: - There are still issues labeled with v1 [2]. Most of them are unrelated to the conclusion of f2f. - Some of the remaining issues are difficult to address in the Shadow DOM spec because it requires non-trivial monkey patches to DOM. I have a plan to upstream the Shadow DOM spec into DOM in the near future. After that, I think we can address some of issues by updating DOM spec directly. - [1] https://github.com/w3c/webcomponents/commits/gh-pages/spec/shadow/ - [2] https://github.com/w3c/webcomponents/labels/v1