js:js生成笛卡尔积；数组排列组合；商品多规格

const getCombination = (array) => {
        let resultArry = []
        array.forEach((arrItem) => {
          if (resultArry.length === 0) {
            resultArry = arrItem
          } else {
            const emptyArray = []
            resultArry.forEach((item) => {
              arrItem.forEach((value) => {
                emptyArray.push([item, value])
              })
            })
            resultArry = emptyArray
          }
        })
        return resultArry
      }

const a = [
          ['A', 'B', 'C'],
          ['C', 'D', 'E'],
        ]
        const b = getCombination(a)
        console.log(b)