moment.js 常用（几天前、相差几天、自然周、自然月）

moment.js 常用（几天前、相差几天、自然周、自然月） 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     var today = moment().format('YYYY-MM-DD'); var last7 = moment().subtract('days', 6).format('YYYY-MM-DD');//7天前 var lart30 = moment().subtract('days', 29).format('YYYY-MM-DD');//30天前   let week = moment(this.searchForm.week); startTime = week.startOf('week').format('YYYYMMDD');//周初 endTime = week.endOf('week').format('YYYYMMDD');//周末   let month = moment(); startTime = month.startOf('month');//月初 endTime = month.endOf('month');//月末