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Component Model
Here's a good starting point for learning about the component model spec, which is currently under development (also see periodically updating gh-pages).
Introduction
TODO Populate with beautifully crafted words.
Overview
Composability
Consistency
Encapsulation
Isolation
Extensibility
Desugaring
Differences From Existing Specs
Templates
Events
Attachment
Styles
<style scoped> is a natural way to limit style sheets to only affect the shadow tree of a component. The component model follows the implementation suggested in this www-style thread. That is, a selector is only matched up to, and including, the scoping element - i.e., the parent element of <style scoped> - but not further. The exceptions are:
- the selector contains the :root pseudo-class (note that this will fail if not used within the first selector sequence), or
- the selector contains the :scope pseudo-class
CSS4: care must be taken that the subject of a selector is the scoping element or a descendant thereof.
[TODO: notes on crossing the boundary from/into the shadow tree]