layer.draggable.overdrag < boolean>

Enable or disable dragging beyond the set constraints.
译：启用或禁用拖动超出设定的限制。

layerA = new Layer
layerA.draggable.enabled = true

layerA.draggable.constraints =
    x: 0
    y: 0
    width: 200
    height: 200

# Disable dragging beyond constraints 
layerA.draggable.overdrag = false