Ext.urlEncode(object) and Ext.urlDecode(string, overwrite) provide object serialization to URL data and URL data deserialization to objects respectively. Encoding is accomplished by creating the URL query string's key-value pairs based on each object property, or array value passed to the encoding function. Decoding is accomplished by creating an object with a property for each key-value pair that exists in the URL's query string.

You can use this recipe when your application needs to send information to the server via AJAX or standard HTTP requests, as well as when you need to use the URL's query string to feed the application data that can later be converted to JavaScript objects.