# Yahoo! UI Library

### dd 3.1.1

Yahoo! UI Library > dd
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### Module: dd

The Drag & Drop Utility allows you to create a draggable interface efficiently, buffering you from browser-level abnormalities and enabling you to focus on the interesting logic surrounding your particular implementation. This component enables you to create a variety of standard draggable objects with just a few lines of code and then, using its extensive API, add your own specific implementation logic.

This module contains the following classes:

- DD.DDM
- DD.Delegate
- DD.Drag
- DD.Drop
- DD.Scroll
- Plugin.DDConstrained
- Plugin.DDNodeScroll
- Plugin.DDProxy
- Plugin.DDWindowScroll
- Plugin.Drag
- Plugin.Drop

#### Submodules:

`dd-constrain`
  The Drag & Drop Utility allows you to create a draggable interface efficiently, buffering you from browser-level abnormalities and enabling you to focus on the interesting logic surrounding your particular implementation. This component enables you to create a variety of standard draggable objects with just a few lines of code and then, using its extensive API, add your own specific implementation logic.
`dd-drop-plugin`
  Simple Drop plugin that can be attached to a Node via the plug method.
`dd-plugin`
  Simple Drag plugin that can be attached to a Node via the plug method.
`dd-ddm-base`
  Provides the base Drag Drop Manger required for making a Node draggable.
`dd-ddm-drop`
  Extends the dd-ddm Class to add support for the placement of Drop Target shims inside the viewport shim. It also handles all Drop Target related events and interactions.
`dd-ddm`
  Extends the dd-ddm-base Class to add support for the viewport shim to allow a draggable node to drag to be dragged over an iframe or any other node that traps mousemove events. It is also required to have Drop Targets enabled, as the viewport shim will contain the shims for the Drop Targets.
`dd-delegate`
  Provides the ability to drag multiple nodes under a container element using only one Y.DD.Drag instance as a delegate.
`dd-drag`
  Provides the ability to drag a Node.
`dd-drop`
  Provides the ability to create a Drop Target.
`dd-proxy`
  Plugin for dd-drag for creating a proxy drag node, instead of dragging the original node.
`dd-scroll`
  Base scroller class used to create the Plugin.DDNodeScroll and Plugin.DDWinScroll. This class should not be called on it's own, it's designed to be a plugin.

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