From Learn About the Ext JavaScript Library

Data store classes

• Ext.data.Store (doc) - The Store class encapsulates a client side cache of Ext.data.Record objects which provide input data for widgets such as the Ext.grid.Grid, or the Ext.form.ComboBox.
  • Ext.data.SimpleStore (doc) - Small helper class to make creating Stores from Array data easier.
  • Ext.data.JsonStore (doc) - Small helper class to make creating Stores for JSON data easier.