怎样操作JS实现根据当前时间随机生成流水号

// 根据当前时间和随机数生成流水号
 randomNumber() {
 const now = new Date()
 let month = now.getMonth() + 1
 let day = now.getDate()
 let hour = now.getHours()
 let minutes = now.getMinutes()
 let seconds = now.getSeconds()
 month = this.setTimeDateFmt(month)
 hour = this.setTimeDateFmt(hour)
 minutes = this.setTimeDateFmt(minutes)
 seconds = this.setTimeDateFmt(seconds)
 return now.getFullYear().toString() + month.toString() + day + hour + minutes + seconds + (Math.round(Math.random() * 89 + 100)).toString()
 }