const JSON = {
      a: {
        b: {
          c: 1
        }
      },
      d: [1, 2],
    }

    const dfs = (n, path) => {
      console.log(n, path);
      Object.keys(n).forEach(k => {
        dfs(n[k], path.concat(k))
      })
    }

    dfs(JSON, [])