const query = tt.createSelectorQuery().in(this)
query
  .select('.ec-canvas')
  .fields({ node: true, size: true })
  .exec(res => {
    console.log('res.....', res)
    const canvasNode = res[0] && res[0].node
    this.canvasNode = canvasNode

为什么获取不到节点信息里的type？现在type是undefined，有解决方案吗