| Name | Description | |
|---|---|---|
 | asyncOperationFailed | Occurs when asynchronous operation is failed. (Inherited from WebUiControlJS) |
| asyncOperationFinished | Occurs when asynchronous operation is finished. (Inherited from WebUiControlJS) |
| asyncOperationStarted | Occurs when asynchronous operation is started. (Inherited from WebUiControlJS) |
| contextMenuShowing | Occurs when context menu is showing. |
| dialogShown | Occurs when dialog is shown. (Inherited from WebUiControlJS) |
| fileOpened | Occurs when file is opened in document viewer. (Inherited from WebDocumentViewerBaseJS) |
| imageDataReceived | Occurs when data of content image of PDF page is received. |
| thumbnailsDeleted | Occurs when the thumbnails deleted. (Inherited from WebDocumentViewerBaseJS) |
| thumbnailsDeleting | Occurs when the thumbnails start deleting. (Inherited from WebDocumentViewerBaseJS) |
| warningOccured | Occurs when warning (non-critical error) occurs during the spreadsheet document editor work. (Inherited from WebUiControlJS) |