The Grid panel supports paging through a large set of data with the help of a PagingToolbar item. To accomplish this we have to make some modifications to our store and add a PagingToolbar item to our grid. For this, we need to create our store, as shown in the following code:

Ext.define('Myapp.store.customers.CustomersC',{
  extend:'Ext.data.Store',
  model: 'Myapp.model.Customer',
  pageSize: 3,
  autoLoad:true,
  proxy:{
    type:'ajax',
    url: 'serverside/customersc.php',
    reader: {
      type:'json',
      rootProperty:'records',
      totalProperty:'total'
    },
    actionMethods :{read:'POST'}
  }
});

In the definition of our store, we declared a pageSize property of 3 and defined a proxy so that we can get the data from the server. Thus, we will be able to paginate our data.

Then we define our grid and the PagingToolbar item that this grid will have:

var myStore = Ext.create("Myapp.store.customers.CustomersC");
var myGrid = Ext.create('Ext.grid.Panel',{
  height: 250...