NVIM: Copy cursor-location's path in json with treesitter

copyJSONPath.lua

local copyJSONPath = function()
  local ts_utils = require 'nvim-treesitter.ts_utils'
  local result = {};
  local node = ts_utils.get_node_at_cursor()
  while node do
    if tostring(node) == '<node pair>' then
      local key_node = node:named_child(0):named_child(0)
      table.insert(result, 1, ts_utils.get_node_text(key_node)[1])
    end
    node = node:parent()
  end
  vim.fn.setreg('"', vim.fn.join(result, '.'))
end

vim.keymap.set('n', '<leader>cp', copyJSONPath)