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, "");}