Often I get the question if it’s possible to generate a PDF from a Sencha app. Well yes that’s possible, but not with Ext JS code only. Though, Ext JS has an exporter, to export grid/pivot data into an XML or Excel file, and you can export charts to images. Out of the box we can’t generate PDFs from full Sencha apps, with the framework.
What you will need is an additional script, often these solutions are handled on the backend, but there are also solutions which can do this client-side.