{"action":"opened","issue":{"url":"https://api.github.com/repos/w3c/webcomponents/issues/655","repository_url":"https://api.github.com/repos/w3c/webcomponents","labels_url":"https://api.github.com/repos/w3c/webcomponents/issues/655/labels{/name}","comments_url":"https://api.github.com/repos/w3c/webcomponents/issues/655/comments","events_url":"https://api.github.com/repos/w3c/webcomponents/issues/655/events","html_url":"https://github.com/w3c/webcomponents/issues/655","id":249283845,"number":655,"title":"Support for pseudo elements with ::slotted() selectors","user":{"login":"rune-opera","id":6996843,"avatar_url":"https://avatars3.githubusercontent.com/u/6996843?v=4","gravatar_id":"","url":"https://api.github.com/users/rune-opera","html_url":"https://github.com/rune-opera","followers_url":"https://api.github.com/users/rune-opera/followers","following_url":"https://api.github.com/users/rune-opera/following{/other_user}","gists_url":"https://api.github.com/users/rune-opera/gists{/gist_id}","starred_url":"https://api.github.com/users/rune-opera/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rune-opera/subscriptions","organizations_url":"https://api.github.com/users/rune-opera/orgs","repos_url":"https://api.github.com/users/rune-opera/repos","events_url":"https://api.github.com/users/rune-opera/events{/privacy}","received_events_url":"https://api.github.com/users/rune-opera/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2017-08-10T09:20:50Z","updated_at":"2017-08-10T09:20:50Z","closed_at":null,"body":"This was discussed in Issue #331 but I don't think we came to a conclusion.\r\n\r\nThe CSS Scoping spec does not explicitly disallow pseudo elements in the \"selector list\" like the specs for  :not() and :matches() do. Neither does it currently explicitly allow pseudo elements after ::slotted.\r\n\r\nShould we:\r\n\r\n1. Not support other pseudo elements on ::slotted selectors\r\n2. Support other pseudo elements inside ::slotted(): ::slotted(div::before)\r\n3. Support other pseudo elements after ::slotted(): ::slotted(div)::before\r\n\r\n@hayatoito @tabatkins"}}
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