{"action":"created","issue":{"url":"https://api.github.com/repos/PolymerElements/iron-list/issues/146","labels_url":"https://api.github.com/repos/PolymerElements/iron-list/issues/146/labels{/name}","comments_url":"https://api.github.com/repos/PolymerElements/iron-list/issues/146/comments","events_url":"https://api.github.com/repos/PolymerElements/iron-list/issues/146/events","html_url":"https://github.com/PolymerElements/iron-list/issues/146","id":118727682,"number":146,"title":"Animated item-collapses","user":{"login":"colindevs","id":12850952,"avatar_url":"https://avatars.githubusercontent.com/u/12850952?v=3","gravatar_id":"","url":"https://api.github.com/users/colindevs","html_url":"https://github.com/colindevs","followers_url":"https://api.github.com/users/colindevs/followers","following_url":"https://api.github.com/users/colindevs/following{/other_user}","gists_url":"https://api.github.com/users/colindevs/gists{/gist_id}","starred_url":"https://api.github.com/users/colindevs/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/colindevs/subscriptions","organizations_url":"https://api.github.com/users/colindevs/orgs","repos_url":"https://api.github.com/users/colindevs/repos","events_url":"https://api.github.com/users/colindevs/events{/privacy}","received_events_url":"https://api.github.com/users/colindevs/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2015-11-24T23:42:20Z","updated_at":"2015-11-26T02:45:12Z","closed_at":null,"body":"This occurred to me while trying out the collapsible `iron-list`[demo](https://elements.polymer-project.org/elements/iron-list?view=demo:demo/collapse.html&active=iron-list). When I clicked on the items to expand, they just seemed to expand in a fraction of a second, as if they were abruptly teleporting. \r\n\r\nFollowing this analogy, I thought it might be nice if they be collapsing more like a child does on a slide, quickly at first and then slowing to a stop. It might enhance UX, with a more fluid and living feel.\r\n\r\nOf course, I am not deep into the Material Design spec or whatever spec your iron animations follow, so the exact animation times and rates would be up to an experienced designer, though I'd be glad to help code this change once I read the dev guides and study the code!"},"comment":{"url":"https://api.github.com/repos/PolymerElements/iron-list/issues/comments/159787507","html_url":"https://github.com/PolymerElements/iron-list/issues/146#issuecomment-159787507","issue_url":"https://api.github.com/repos/PolymerElements/iron-list/issues/146","id":159787507,"user":{"login":"colindevs","id":12850952,"avatar_url":"https://avatars.githubusercontent.com/u/12850952?v=3","gravatar_id":"","url":"https://api.github.com/users/colindevs","html_url":"https://github.com/colindevs","followers_url":"https://api.github.com/users/colindevs/followers","following_url":"https://api.github.com/users/colindevs/following{/other_user}","gists_url":"https://api.github.com/users/colindevs/gists{/gist_id}","starred_url":"https://api.github.com/users/colindevs/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/colindevs/subscriptions","organizations_url":"https://api.github.com/users/colindevs/orgs","repos_url":"https://api.github.com/users/colindevs/repos","events_url":"https://api.github.com/users/colindevs/events{/privacy}","received_events_url":"https://api.github.com/users/colindevs/received_events","type":"User","site_admin":false},"created_at":"2015-11-26T02:45:12Z","updated_at":"2015-11-26T02:45:12Z","body":"Ok, thanks.\nOn Nov 25, 2015 9:14 PM, \"Emmanuel Garcia\" <notifications@github.com> wrote:\n\n> There's a branch that has this feature.\n> https://github.com/PolymerElements/iron-list/tree/flexible-sizes\n>\n> —\n> Reply to this email directly or view it on GitHub\n> <https://github.com/PolymerElements/iron-list/issues/146#issuecomment-159783415>\n> .\n>\n"}}