SOURCE

function combine(...chunks) {
    console.log(chunks)
    let res = []
    let helper = function (chunkIndex, prev) {
        let chunk = chunks[chunkIndex].list
        let name = chunks[chunkIndex].title
        let isLast = chunkIndex === chunks.length - 1
        for (let val of chunk) {
            // console.log(val)
            let cur = prev.concat( val )
            if (isLast) {
                // 如果已经处理到数组的最后一项了 则把拼接的结果放入返回值中
                res.push({
                    specs: cur,
                })
            } else {
                helper(chunkIndex + 1, cur)
            }
        }
    }
    // 从属性数组下标为 0 开始处理
    // 并且此时的 prev 是个空数组
    helper(0, [])
    return res
}

const specList = [
    { title: "颜色", list: ["红色", "紫色", "白色", "黑色"] },
    { title: "套餐", list: ["套餐一", "套餐二", "套餐三", "套餐四"] },
    { title: "内存", list: ["64G", "128G", "256G"] }
]

let skuList=combine(...specList)
// console.log(skuList)