问visjs 分层布局 新增节点 线条交叉问题？

      nodes: {
        font: {
          size: 0
        },
        size: 10
      },
      layout: {
        randomSeed: 1,
        improvedLayout : true,
        hierarchical: {
          enabled: true,
          levelSeparation: 200,
          nodeSpacing: 100,
          treeSpacing: 0,
          blockShifting: true,
          edgeMinimization: false,
          parentCentralization: true,
          sortMethod: "directed",
          direction: "UD",
          shakeTowards: "roots"
        }
      },
      physics: {
        enabled: false,
        forceAtlas2Based: {
          springConstant: 1
        },
        "barnesHut": {
          "avoidOverlap": 0.2
        },
        repulsion: {
          nodeDistance: 100,
        },
        stabilization: {
          fit: true
        }
      },
      edges: {
        font: { align: "top" },
        smooth: false,
        arrows: {
          to: {
            scaleFactor: 0.3
          }
        }
      }