真为难啊！
var arr = [
{guigeArr:['蓝色','XL','3','S']},
{guigeArr:['蓝色','L','6','S']},
{guigeArr:['蓝色','L','3','S']},
{guigeArr:['蓝色','XL','6','S']}, {guigeArr:['黑色','XL','3','S']},
{guigeArr:['黑色','L','6','S']},
{guigeArr:['黑色','L','3','S']},
{guigeArr:['黑色','XL','6','S']},
] var newArr = []
var length = arr[0].guigeArr.length;
for(var i=0;i<length;i++){
var arrs = [];
newArr.push(arrs)
}
console.log(newArr)
// [[], [], [], []] arr.forEach(({guigeArr})=>{
guigeArr.forEach((v,i)=>{
if(!newArr[i].includes(v))
newArr[i].push(v)
})
}) console.log(newArr)
// [["蓝色", "黑色"], ["XL", "L"], ["3", "6"], ["S"]]
* 备注
includes() 方法用来判断一个数组是否包含一个指定的值，根据情况，如果包含则返回 true，否则返回false。