JS将一个数组切分为多个数组

function group(array, subGroupLength) {
    let index = 0;
    let newArray = [];
    while(index < array.length) {
        newArray.push(array.slice(index, index += subGroupLength));
    }
    return newArray;
}
let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
let groupArr = group(arr, 3);
console.log(groupArr) // [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10]]