This advanced example shows how to use ExtJS 5 MVVM architecture to bind the record selected in grid to form. The record is editable both in the grid and form and form buttons are enabled and disabled according to the record valid and dirty state.
This example shows how to create a button or link for downloading a file. The example creates hidden helper iframe and hidden form. Iframe is the target of the form submit. Return the correct HTTP headers from the server is crucial.