对象数组根据对象中某一元素进行排序

以时间排序为例

知识点：js原生数组排序 Array.sort(function(){})

//处理函数
handleSort(obj){
    obj.sort((a,b)=>{
        let t1 = new Date(Date.parse(a.birthday.replace(/-/g,"/")))
        let t2 = new Date(Date.parse(b.birthday.replace(/-/g,"/")))
        return t2.getTime()-t1.getTime()
    })
    return obj
},

如何使用：
let objList=[
  {title:"小红", birtyday:'2020-04-05', height:"60"},
  {title:"小明", birthday:'2020-06-06', height:"50"},
  {title:"小刚", birthday:'2020-05-05', height:"55"}
]
objList=this.handleSort(objList)