前端两三问

1、js 获取当前日期星期几

getWeek(time) {    let weekDay = ["周日","周一", "周二", "周三", "周四", "周五", "周六"];        let myDate = new Date(Date.parse(time));      return weekDay[myDate.getDay()]},console.log(getWeek('2019-09-11')   // 周三

2、iveiw 时间限制今天之前不可选

<Date-picker   type="date"   :options="pickerOptionsStart" ></Date-picker>pickerOptionsStart: {  disabledDate (time) {    return time.getTime() < new Date(new Date().toLocaleDateString()).getTime();  }}

3、js 计算某个时间 前 15天 后15天

function GetDateStr(AddDayCount, date, type) {         var dd = new Date(date);        dd.setDate(dd.getDate()+AddDayCount);        var y = dd.getFullYear();         var m = (dd.getMonth()+1)<10?"0"+(dd.getMonth()+1):(dd.getMonth()+1);        var d = dd.getDate()<10?"0"+dd.getDate():dd.getDate();        if(type){            if(date === this.oldTime) {                return '今天'            } else {                return d            }        } else {            return y + "-" + m + "-" + d;         }}GetDateStr(-14, '2019-09-12')  //  2019-08-29 GetDateStr(14, '2019-09-12')  //  2019-09-26