js 获取一年月份

function  mathDate(){
    var nowDate = new Date()
    let nowYear = nowDate.getFullYear();
    let nowMonth = (nowDate.getMonth())<10?'0'+(nowDate.getMonth()):(nowDate.getMonth());
    var d = new Date(nowYear+'-'+nowMonth);
    var result = [];
    d.setMonth(d.getMonth() + 2);
    for(var i = 1; i < 13; i++) {
        d.setMonth(d.getMonth() - 1);
        let m = d.getMonth() + 1;
        m = m < 10 ? ("0" + m) : m;
        let val = {
            value: d.getFullYear() + "年" + m + '月',
            label:d.getFullYear() + "-" + m
        }
        //在这里可以自定义输出的日期格式
        result.push(val);
    }
    // 一年的日期
        
    // 当前年月
    let thisMonth = (d.getMonth())<10?'0'+(d.getMonth()):(d.getMonth());
    let thisYear = d.getFullYear()+1;
    if(thisMonth == 0){
        this.nowData = (thisYear-1)+"-12";
    }else{
        this.nowData = thisYear+"-"+thisMonth;
    }
    let nowobj ={
        value:thisYear+'年'+thisMonth+'月',
        label:thisYear+'-'+thisMonth
    }
    this.selectData = result;
    this.selectValue = this.nowData
}

可以添加当前月份 把获取的数组处理一下