vue 日期占某段日期的百分比

//str  传入的日期格式为xx年xx月xx日

chDate2date (str) {  return str.replace(/[年|月]/g, '-').replace('日', '')},

//start为开始日期   end为结束日期getProcess (start, end) {  start = +new Date(this.chDate2date(start))  end = +new Date(this.chDate2date(end))  let now = +new Date  let rs = (now - start) / (end - start)  rs = rs > 1 ? 1 : rs.toFixed(2)  return rs * 100},formatTooltip (val) {  let myDate = new Date()  let currdentData = myDate.toLocaleDateString()  return currdentData;}