How to specify types for an array in which an array, etc.?

Question

typescript

for example

arr1: [
    {
      arr1info: [
        {
          arr1infocontent: "апвапва",
          arr1infoheading: "апвапва"
        },
        {
          arr1infocontent: "апвапва",
          arr1infoheading: "апвапва"
        },
        "foobar"
      ],
      arr1infoheading: "апвапва"
    },
    {
      arr1info: [
        {
          arr1infocontent: "апвапва",
          arr1infoheading: "апвапва"
        },
        {
          arr1infocontent: "апвапва",
          arr1infoheading: "апвапва"
        },
        "foobar"
      ],
      arr1infoheading: "апвапва"
    }
]

There is 1 array specified here, but there are many of them, and how can they all be assigned types?
Just started learning timescript and got stuck

Answer 1

interface Iarr2Info {[key: string]: string; }
type Info = (Iarr2Info|string)[];
interface Iarr1Info {[key: string]: string|Info; }

let arr1: Iarr1Info[] = [
  {
    arr1info: [
      {
        arr1infocontent: "апвапва",
        arr1infoheading: "апвапва"
      },
      {
        arr1infocontent: "апвапва",
        arr1infoheading: "апвапва"
      },
      "foobar"
    ],
    arr1infoheading: "апвапва"
  },
  {
    arr1info: [
      {
        arr1infocontent: "апвапва",
        arr1infoheading: "апвапва"
      },
      {
        arr1infocontent: "апвапва",
        arr1infoheading: "апвапва"
      },
      "foobar"
    ],
    arr1infoheading: "апвапва"
  }
];