js获取当前时间，年月日时分秒

 // 获取当前时间
    getNowTime: function () {
      let dateTime
      let yy = new Date().getFullYear()
      let mm = new Date().getMonth() + 1
      let dd = new Date().getDate()
      let hh = new Date().getHours()
      let mf = new Date().getMinutes() < 10 ? ‘0‘ + new Date().getMinutes()
        :
        new Date().getMinutes()
      let ss = new Date().getSeconds() < 10 ? ‘0‘ + new Date().getSeconds()
        :
        new Date().getSeconds()
      dateTime = yy + ‘-‘ + mm + ‘-‘ + dd + ‘ ‘ + hh + ‘:‘ + mf + ‘:‘ + ss
      console.log(dateTime)
      return dateTime
    },