sku数据整合

var attrArr = [{name:'颜色',detail:['红','蓝','黄']},{name:'尺寸',detail:['20cm','30cm']}]

var tmp = []
                for (var i in attrArr) {
                  tmp.push(attrArr[i].detail)
                }
                function cartesianProductOf() {
                    return Array.prototype.reduce.call(arguments, function (a, b) {
                        var ret = [];
                        a.forEach(function (a) {
                            b.forEach(function (b) {
                                ret.push(a.concat([b]));
                            });
                        });
                        return ret;
                    }, [[]]);
                }
                let allArr = cartesianProductOf(...tmp)
                console.log(allArr)  //[['红','20cm'],['红','30cm'],['蓝','20cm'],['蓝','30cm'],['黄','20cm'],['黄','30cm']]