[TypeScript] 合併型の配列(複数の型が含まれているを配列)の型定義

const stgList: string[] = ['1', '2', '3', '4', '5'];

console.log(stgList);

["1", "2", "3", "4", "5"] 

const numList: number[] = [1, 2, 3, 4, 5];

console.log(numList);

[1, 2, 3, 4, 5] 

const numList: number[] = [1, 2, 3, '4', '5'];

console.log(numList);

Type 'string' is not assignable to type 'number'.

const numOrStgList: (number | string)[] = [1, 2, 3, '4', '5'];

console.log(numOrStgList);

[1, 2, 3, "4", "5"] 

const numMultiList: number[][] = [
  [1, 2, 3, 4, 5],
  [6, 7, 8, 9, 10],
]

console.log(numMultiList);

[[1, 2, 3, 4, 5], [6, 7, 8, 9, 10]] 

const numOrStgListMulti: (number | string)[][] = [
  ['1', '2', '3', '4', '5'],
  [6, 7, 8, 9, 10],
]

console.log(numMultiList);

[["1", "2", "3", "4", "5"], [6, 7, 8, 9, 10]]