moment.js 常用

let pickDate = moment(this.searchForm.date);

let firstDay = pickDate.day(0).format('YYYYMMDD');//上周天

let lastDay = pickDate.day(7).format('YYYYMMDD');//周天

let previousDate = moment(this.searchForm.date).subtract(1, "weeks").format("YYYY-MM-DD");//上周

let diff = pickDate.diff(moment(), 'days');//相差几天