{"action":"opened","issue":{"url":"https://api.github.com/repos/Polymer/polymer/issues/3061","labels_url":"https://api.github.com/repos/Polymer/polymer/issues/3061/labels{/name}","comments_url":"https://api.github.com/repos/Polymer/polymer/issues/3061/comments","events_url":"https://api.github.com/repos/Polymer/polymer/issues/3061/events","html_url":"https://github.com/Polymer/polymer/issues/3061","id":117952977,"number":3061,"title":"Observers being called repeatedly when multiple property changes at the sametime.","user":{"login":"yutingzhao1991","id":1061968,"avatar_url":"https://avatars.githubusercontent.com/u/1061968?v=3","gravatar_id":"","url":"https://api.github.com/users/yutingzhao1991","html_url":"https://github.com/yutingzhao1991","followers_url":"https://api.github.com/users/yutingzhao1991/followers","following_url":"https://api.github.com/users/yutingzhao1991/following{/other_user}","gists_url":"https://api.github.com/users/yutingzhao1991/gists{/gist_id}","starred_url":"https://api.github.com/users/yutingzhao1991/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/yutingzhao1991/subscriptions","organizations_url":"https://api.github.com/users/yutingzhao1991/orgs","repos_url":"https://api.github.com/users/yutingzhao1991/repos","events_url":"https://api.github.com/users/yutingzhao1991/events{/privacy}","received_events_url":"https://api.github.com/users/yutingzhao1991/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-11-20T02:33:02Z","updated_at":"2015-11-20T02:33:02Z","closed_at":null,"body":"```js\r\nobservers: [ 'valueChanged(startDate,endDate)' ],\r\n\r\nthis.startDate = moment(start).format(DATE_FORMAT)\r\nthis.endDate = moment(end).format(DATE_FORMAT)\r\n// then valueChanged will be called twice.\r\n```\r\nIs this is a bug ?\r\nAny solution to resolve this problem ?"}}