Hierarchical data is something that most developers are intimately familiar with. The root-branch-leaf structure is the underlying feature for many user interfaces, from the file and folder representations in Windows Explorer to the classic family tree showing children, parents, and grandparents. The Ext.tree package enables developers to bring these data structures to the user with only a few lines of code, and provides for a range of advanced cases with a number of simple configuration options.
Although the default Ext JS icon set shows tree nodes as files and folders, it is not restricted to the file system concept. The icons and text of the items, or nodes in your tree, can be changed based on the dynamic or static data used to populate it—and without requiring custom code. How about a security screen showing permission groups containing a number of users, with icons showing a photo of each user, or a gallery showing groups of photos...