Components.interfacesByID

From MDC

Components.interfacesByID is a read-only array of classes indexed by IID.

[edit] Introduction

Components.interfacesByID is a read-only array of objects which implement the nsIJSIID interface. Each object represents one of the XPCOM interfaces -- that some component or another might or might not implement. It reflects only those interfaces which have been designated in their .idl description as [scriptable], i.e. the interfaces which XPConnect is capable of reflecting into JavaScript.

Components.interfacesByID is exactly like Components.interfaces except that the elements are indexed by the canonical form of their IID.

[edit] Usage

You can retrieve an interface object using:

var iface = Components.interfacesByID["{aa610f20-a889-11d3-8c81-000064657374}"];