js实现商品sku组合

const data = [
	['红色','绿色','金色','青色','白色'],
	['M','L','XL','XXL','XXXL'],
	['男装','女装']
]
var sku = getSku(data)

function getSku(data) {
        let newArr = [];
        let delimiter = "|(_##sku##_)|"; // 分隔符，避免sku中出现相同字符出现数据丢失情况
        function get(index, arr, str) {
            let list = "";
            for (let i = 0; i < arr[index].length; i++) {
                list = (str === "" ? "" : str + delimiter) + arr[index][i];
                if (index + 1 === arr.length) {
                    newArr.push(list.split(delimiter));
                } else {
                    get(index + 1, arr, list);
                }
            }
            return newArr;
        }

        return get(0, data, "");
    }