{"action":"created","comment":{"url":"https://api.github.com/repos/PolymerElements/paper-header-panel/pulls/comments/30266622","id":30266622,"diff_hunk":"@@ -249,22 +278,15 @@\n          *       </paper-toolbar>\n          *       <div class=\"content\"></div>\n          *     </paper-header-panel>\n-         *\n-         * @attribute mode\n-         * @type string\n-         * @default ''\n          */\n         mode: {\n           type: String,\n-          value: ''\n+          value: '',\n+          observer: 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set `reflectToAttribute: true` to reflect to value to attribute so the css you have above ```:host([mode=cover])``` would work.","created_at":"2015-05-13T19:27:41Z","updated_at":"2015-05-13T19:27:41Z","html_url":"https://github.com/PolymerElements/paper-header-panel/pull/9#discussion_r30266622","pull_request_url":"https://api.github.com/repos/PolymerElements/paper-header-panel/pulls/9","_links":{"self":{"href":"https://api.github.com/repos/PolymerElements/paper-header-panel/pulls/comments/30266622"},"html":{"href":"https://github.com/PolymerElements/paper-header-panel/pull/9#discussion_r30266622"},"pull_request":{"href":"https://api.github.com/repos/PolymerElements/paper-header-panel/pulls/9"}}},"pull_request":{"url":"https://api.github.com/repos/PolymerElements/paper-header-panel/pulls/9","id":35360743,"html_url":"https://github.com/PolymerElements/paper-header-panel/pull/9","diff_url":"https://github.com/PolymerElements/paper-header-panel/pull/9.diff","patch_url":"https://github.com/PolymerElements/paper-header-panel/pull/9.patch","issue_url":"https://api.github.com/repos/PolymerElements/paper-header-panel/issues/9","number":9,"state":"open","locked":false,"title":"Refactor 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