Для получения индекса
for (const v of ['a', 'b', 'c']) {
console.log(v)
}
// get index
for (const [i, v] of ['a', 'b', 'c'].entries()) {
console.log(i, v)
}
GutoTrosla
for (const v of ['a', 'b', 'c']) {
console.log(v)
}
// get index
for (const [i, v] of ['a', 'b', 'c'].entries()) {
console.log(i, v)
}for (const [index, value] of [1, 2, 3, 4, 5].entries()) {
console.log(index, value);
}