对年月日数据的处理

查询年月日

let dy='日'let listtime= maxDay('2022-12-31',dy)console.log(listtime);function maxDay(lastYear,dy){//查询日期年月日的处理    let Timesend,Timestate    let lastDate=new Date(lastYear)    let lastYear1=lastDate.getFullYear()    let lastMonth=lastDate.getMonth()+1    let lastgetDate=lastDate.getDate()    let lastYearMonth=new Date(lastYear1,lastMonth,0)    let lastYearMonthdate=lastYearMonth.getDate()//获取查询月的最后一天    let thisDate=new Date()    let thisYear1=thisDate.getFullYear()    let thisMonth=thisDate.getMonth()+1    let lastgetDate1=lastgetDate+1>lastYearMonthdate?01:lastgetDate+1   let lastMonth1=dy=='日'&&lastgetDate<lastYearMonthdate?by2(lastMonth):lastMonth+1>12?'01':by2(lastDate.getMonth()+2)    let lastYear2=lastMonth+1>12&&dy=='月'?lastDate.getFullYear()+1:lastMonth+1>12&&dy=='日'&&lastgetDate+1>lastYearMonthdate?lastDate.getFullYear()+1:dy=='年'?lastDate.getFullYear()+1:lastDate.getFullYear()    if(lastYear1==thisYear1 && thisMonth==lastMonth || lastYear1==thisYear1 && dy=='年'){         Timestate=lastYear1+'-'+`${dy=='年'?'01':by2(lastMonth)}-${dy=='年'?'01':dy=='月'?'01':by2(lastgetDate)} 08:00:00`         Timesend=lastYear1+'-'+`${by2(lastMonth1)}-${by2(lastgetDate1)} 08:00:00`    }else{       Timestate=lastYear1+'-'+`${dy=='年'?'01':by2(lastMonth)}-${dy=='年'?'01':dy=='月'?'01':by2(lastgetDate)} 08:00:00`       Timesend=`${lastYear2}`+'-'+`${dy=='年'?'01':dy=='日'?lastMonth1:lastMonth1}-${dy=='年'?'01':dy=='月'?'01':by2(lastgetDate1)} 08:00:00`    }   return {Timesend,Timestate}}

function by2(params) {    return params<10?'0'+params:params}