1.el官方示例过滤方法

const filterNode = (value: string, data: Tree) => {
  if (!value) return true
  return data.label.includes(value)
}

2.修改后的过滤方法

/**
 * 树节点过滤
 */
const filterNode = (value, data, node) => {
  if (!value) return true;
  let parentNode = node.parent;
  let labels = [node.label];
  let level = 1;
  while (level < node.level) {
    labels = [...labels, parentNode.label];
    parentNode = parentNode.parent;
    level++;
  }
  return labels.some((label) => label.indexOf(value) !== -1);
};

参考地址

https://blog.csdn.net/weixin_44072916/article/details/112370398