:target selector does not work on page load

[aeosynth]

http://jsbin.com/voruhaxo/1#foo

'foo' is not highlighted on page load. without polymer, this works

[ebidel]

If you click the links in the Shadow DOM, they don't work as navigational targets (e.g. the hash doesn't update) so CSS :target should also not work.

Background: When this came talking to the spec folks, the argument was that ids are scoped to ShadowDOM so they don't make sense as navigation targets.

[ebidel]

BTW, if you want something like deep linking, you'll have to use JS. Example:
https://github.com/GoogleChrome/chromium-dashboard/blob/master/static/elements/chromedash-metrics.html#L60

[aeosynth]

then this is a bug the other way - after page load, the :target selector works on shadow dom

[ebidel]

http://jsbin.com/voruhaxo/6/quiet

What I see is that clicking the link in the Shadow DOM does make the navigational jump to the anchor target (outside of the SD). Clicking a link outside the SD does not make the jump to a target that's inside the SD. This makes sense from the scoping/encapsulation standpoint.