SOURCE

var categoryName = 's'
    function filterTree(node) {
      if (!(node.subcategoryList && node.subcategoryList.length)) {
        return node.categoryName.includes(categoryName)
      }
      node.subcategoryList = node.subcategoryList.filter(filterTree)
      if (node.categoryName.includes(categoryName)) {
        return true
      }
      return node.subcategoryList.length > 0
    }
    var tree = [
      {
        categoryName: 'zhangsna',
        subcategoryList: [
          {
            categoryName: 'zhangsi',
            subcategoryList: []
          }
        ]
      },
      {
        categoryName: 'lisi',
        subcategoryList: [{ categoryName: 'liwu' }]
      }
    ]
    var res = tree.filter(filterTree)
    console.log(res)