商品多规格 排列组合 生成新的数组列

数据格式：
// 数据格式：
      let arrs = [{
          "specNameObj": {
            "code": "02",
            "name": "材质",
          },
          "specChildNameObj": [{
              "code": "001",
              "specValue": "银",
              "seq": 1,
            },
            {
              "code": "002",
              "specValue": "金",
              "seq": 2,
            }
          ]
        },
        {
          "specNameObj": {
            "code": "01",
            "name": "颜色",
          },
          "specChildNameObj": [{
              "code": "01",
              "specValue": "黄色",
              "seq": 1,
            },
            {
              "code": "02",
              "specValue": "蓝色",
              "seq": 2,
            }, {
              "code": "03",
              "specValue": "紫色",
              "seq": 2,
            }
          ]
        }
      ]

      function multiplyData(newArrData) {
        let len = newArrData.length;
        
        // 当数组长度大于等于2时
        if (len >= 2) {
          // 第一个数组的长度
          let len1 = newArrData[0].specChildNameObj.length;
          // 第二个数组的长度
          let len2 = newArrData[1].specChildNameObj.length;
          console.log(len1,len2)
          //  申明一个新数组,做数据暂存
          let items = new Array();
          // 申明新数组的索引
          let index = 0;

          // 2层嵌套循环,将组合放到新数组中
          for (var i = 0; i < len1; i++) {
            for (var j = 0; j < len2; j++) {
              if (items.length < index + 1) {
                items.push([])
              }
              if (newArrData[0].specChildNameObj[i] instanceof Array) {
                items[index] = items[index].concat(newArrData[0].specChildNameObj[i].concat(newArrData[1].specChildNameObj[j]));
              } else {
                items[index] = items[index].concat([newArrData[0].specChildNameObj[i], newArrData[1].specChildNameObj[j]]);
              }
              index++;
            }
          }
          // 将新组合的数组并到原数组中
          let newArr = new Array(len - 1);
          for (let i = 2; i < newArrData.length; i++) {
            newArr[i - 1] = newArrData[i];
          }
          newArr[0] = items;
          // 执行回调
          return multiplyData(newArr);
        } else {
          // console.log(newArrData);
          return newArrData[0];
        }

      }
      
      let newArr = multiplyData(arrs);
      console.log(newArr);

原博主链接：https://blog.youkuaiyun.com/weixin_43363871/article/details/121604277