Draggable

Layers can be made horizontally and/or vertically draggable. They can be tossed around with momentum. To control where they end up, you can define a specific area that a layer can be dragged within. They can optionally be dragged beyond this area, but they will then bounce back by default.
译：层可以横向和/或垂直拖动。他们可以被抛在周围的势头。为了控制他们的最终结束，你可以定义一个特定的区域，一个层可以被拖动到。他们可以随意地被拖到这一地区，但他们会在默认情况下反弹回来。