- It's HTTPHandler file
- ScriptResource.AXD contains all of the clientside javascript routines for Ajax.
- Automatically GZip/Compressing your scripts.
- Dynamically resolving Release/Debug scripts based on build parameters. This is useful, if you keep two types of the same script: one for debug, and one packed for release.
- Can be used for Non-MsAJAX Framework script assets such as jQuery.