删除活动对象的FabricJS问题

const canvas = new fabric.Canvas('canvas-id');

const rect = new fabric.Rect({
  left: 50,
  top: 50,
  fill: 'red',
  width: 100,
  height: 100
});

canvas.add(rect);

const activeObject = canvas.getActiveObject();

if (activeObject) {
  canvas.remove(activeObject);
}

const activeGroup = canvas.getActiveGroup();
if (activeGroup) {
  canvas.remove(activeGroup);
}

canvas.clear();