纯前端导出excel一对多数据(上)

`let a = [
{
id: 1,
name: '刘备',
age: 2,
skill: [{ eac: 1 }, { ebc: 2 }, { ebc: 7 }]
}, {
id: 2,
name: '关羽',
age: 3,
skill: [{ eac: 3 }, { ebc: 4 }]
}, {
id: 3,
name: '张飞',
age: 4,
skill: [{ eac: 5 }, { ebc: 6 }]
},
{
id: 4,
name: '赵云',
age: 5,
skill: []
}
]

function mapNewArr (arr) {
let newArr = []
arr.map((item,index) => {
let rowNum = 1
let isArr = Array.isArray(item.skill)
let noGood = item.skill.length
console.log(item.skill.length)
if (!!isArr) {
console.log('noGood', noGood)
if (noGood === 0) {
newArr[index].skill = ''
return newArr
}
item.skill.map((ite, ind) => {
rowNum = ind + 1
console.log(ite)
newArr.push({
...item,
skill: ite
})
})
console.log('rowNum', rowNum)
return newArr
} else {
newArr = arr
return newArr
}
})
return newArr
}

let b = mapNewArr(a)
console.log('b', b)`

后期有时间处理一下重复id的合并，当然如果有好心大哥贡献我当百倍感谢