方法列表：

1.获取当前时间

//获取当前时间

getdate(){
    let date= new Date();    //默认情况下，JS将使用浏览器的时区并将日期显示为全文本字符串(Sat Mar 5 2022 09:26:12 GMT+0800 (中国标准时间))

    let year = date.getFullYear();      //年
    let month = date.getMonth() + 1;    //月
    let strDate = date.getDate();       //日
    let hours = date.getHours();        //时
    let minutes = date.getMinutes();    //分
    let seconds = date.getSeconds();    //秒

    let time = year + "年" + month + "月" + strDate + "日 " + hours + "时" + minutes + "分" + seconds + "秒" ;
    
    //小于10，前面加0
	if (month >= 1 && month <= 9) {
	    month = "0" + month;
	}
	if (strDate >= 0 && strDate <= 9) {
	    strDate = "0" + strDate ;
	}
	if (hours >= 0 && hours <= 9) {
	    hours = "0" + hours;
	}
	if (minutes >= 0 && minutes <= 9) {
	    minutes = "0" + minutes;
	}
	if (seconds >= 0 && seconds <= 9) {
	    seconds = "0" + seconds;
    }

    let time1 = year + "-" + month + "-" + strDate + " " + hours + ":" + minutes + ":" + seconds ;

    return {time, time1};
}

 2.时间做比较（先把日期转化为毫秒数，再做比）

// 两个日期比大小
compareDate(val1,var2){
    let date1= new Date(val1);
    let date2= new Date(val2);
    let isCompare = date1.getTime() > date2.getTime()
    return isCompare;    //val1大于val2，返回ture,否则返回false
}