| Attributes |
| Name | Required | Request-time | Type | Description |
| collapsible | false | true | boolean | Sets whether the panel can be collapsed. The default value is true. |
| cssClass | false | true | java.lang.String | Sets a CSS class for styling this component. |
| defaultState | false | true | java.lang.String | Sets the default state of the panel. Possible values are open and any string other than open. Any string other than open collapses the panel. The default value is open. |
| extended | false | true | boolean | Sets whether the panel is extended. The default value is false. |
| helpMessage | false | true | java.lang.String | Sets text to be displayed as a help tool tip on mouse over of the panel's help icon. |
| iconCssClass | false | true | java.lang.String | No Description |
| id | false | true | java.lang.String | Identifies the component instance. |
| parentId | false | true | java.lang.String | Specifies the ID of the component that contains the panel. If a liferay-ui:panel-container is used as the container for the panel, its ID is used as the value for the parentID. |
| persistState | false | true | boolean | No Description |
| state | false | true | java.lang.String | Sets the state of the panel. Possible values are open and any string other than open. Any string other than open collapses the panel. |
| title | true | true | java.lang.String | Sets the panel's title and displays it at the top of the panel. |