1for (const [index, value] of [1, 2, 3, 4, 5].entries()) {
2  console.log(index, value);
3}

1for (const [i, v] of ['a', 'b', 'c'].entries()) {
2  console.log(i, v)
3}
4

1for (const [i, v] of ['a', 'b', 'c'].entries()) {
2  console.log(i, v)
3}