layer.draggable.bounce < boolean>

Spring animation when momentum runs beyond constraints.
译：弹簧动画动量运行时超出限制

layerA = new Layer
layerA.draggable.enabled = true

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

# Snap back after dragging beyond constraints 
layerA.draggable.bounce = false