JS создает массив с n элементами
var foo = new Array(100).fill('DefaultValue');
Blushing Baboon
var foo = new Array(100).fill('DefaultValue');function range(start, end) {
return Array(end - start + 1).fill().map((_, idx) => start + idx)
}
var result = range(9, 18); // [9, 10, 11, 12, 13, 14, 15, 16, 17, 18]
console.log(result);Array.from(Array(10).keys())
//=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]var foo = new Array(45); // create an empty array with length 45