Exporter is a generic export class which takes any Ext.data.Store-based component (e.g. grids and similar) and exports the data in any format.

Exporter can work both client-side and server-side(only if browser doesn’t support client side save).

It uses a Formatter classes to generate a document (.xls, .csv etc) which is then used to create a Blob. With this blob url you can save file locally in browser.
If browser doesn’t support blob, you can either open document in new window with data: uri or download remotely by sending data to server

• Download the latest version from here and copy it into your ux/exporter folder.

• Include “Ext.ux.exporter.Exporter” in requires of your App

• Create an instance of ExporterButton with required configs

The most common use case for the Exporter is exporting a grid to CSV/Excel, which is as simple as doing the following:

var grid = new Ext.grid.GridPanel({
  store: someStore,
  tbar : [
    {
      xtype: 'exporterbutton',
      store: someStore
	//Or you can use
      //component: someGrid
      //component: someTree
      //component: '#someGridItemId'
    }
  ],
  //your normal grid config goes here
});

The provided ‘exportbutton’ is just a specialised Ext.Button subclass which uses Ext.ux.exporter.FileSaver to save file locally or download remotely.

https://fiddle.sencha.com/#fiddle/6st