Time formatting

1、 Time format

export const formatDate = (date, fmt) => {
  date = date || new Date();
  fmt = fmt || 'yyyy-MM-dd hh:mm:ss';
  if (Object.prototype.toString.call(date).slice(8, -1) !== 'Date') {
    date = new Date(date)
  }
  if (/(y+)/.test(fmt)) {
    fmt = fmt.replace(RegExp.$1, (date.getFullYear() + '').substr(4 - RegExp.$1.length))
  }
  let o = {
    'M+': date.getMonth() + 1,
    'd+': date.getDate(),
    'h+': date.getHours(),
    'm+': date.getMinutes(),
    's+': date.getSeconds()
  }
  for (let k in o) {
    if (new RegExp(`(${k})`).test(fmt)) {
      let str = o[k] + ''
      fmt = fmt.replace(RegExp.$1, (RegExp.$1.length === 1) ? str : (("00" + 
             o[k]).substr(("" + o[k]).length)))
    }
  }
  return fmt
}

2、 Get the current day 、 month 、 Year specific time

/**
 *  Get current day 、 month 、 Year start time 
 * @param {*} type  Time type 
 */
export function getCurrStartTime(type) {
  let time
  if (type == "day") {
    time = formatDate(new Date(new Date().getTime()), "yyyy-MM-dd") + " 00:00:00"
  } else if (type == "mouth") {
    time = formatDate(new Date(new Date().getTime()), "yyyy-MM") + "-01 00:00:00"
  } else {
    time = formatDate(new Date(new Date().getTime()), "yyyy") + "-01-01 00:00:00"
  }
  return time
}



/**
 *   Get current day 、 month 、 Year end time 
 * @param {*} type  Time type 
 */
export function getCurrEndTime(type) {
  let time
  if (type == "day") {
    time = formatDate(new Date(new Date().getTime() + 24 * 60 * 60 * 1000), "yyyy-MM-dd") + " 00:00:00"
  } else if (type == "mouth") {
    let item = new Date().setMonth(new Date().getMonth() + 1);
    time = formatDate(new Date(item), "yyyy-MM") + "-01 00:00:00"
  } else {
    time = String(Number(formatDate(new Date(new Date().getTime()), "yyyy")) + 1) + "-01-01 00:00:00"
  }
  return time
}

3、 Get the time of the same period according to the incoming time , Yesterday, 、 Last month 、 last year

/**
 *  Get the time of the same period , Yesterday, , Last month , last year 
 * @param {*} checktime  Start time of query 
 * @param {*} timetype  Japan 、 month 、 year 
 */

export function getCheckBeforeTime(checktime,timetype){
    let newtiem={}
    if(timetype=="day"){
        newtiem.fromDate = formatDate(new Date(new Date(checktime).getTime()-24*60*60*1000), "yyyy-MM-dd") + " 00:00:00"
    }else if(timetype=="month"){
        let item = new Date(checktime).setMonth(new Date(checktime).getMonth() - 1);
        let time = formatDate(new Date(item), "yyyy-MM") + "-01 00:00:00"
        newtiem.fromDate = time
    }else{
        let time = String(Number(formatDate(new Date(new Date(checktime).getTime()), "yyyy")) - 1) + "-01-01 00:00:00"
        newtiem.fromDate = time
    }
    newtiem.toDate = checktime
    return newtiem
}

4、 According to the incoming time , Get today of last year 、 This month last year

/**
 *  Get the cycle time 
 * @param {*} checktime_form // Incoming start time 
 * @param {*} checktime_to // End time of incoming 
 * @param {*} timetype // Time type 
 */

export function getCheckRepeatTime(checktime_form,checktime_to,timetype){ // Get the time of the same period , Yesterday, , Last month , last year 
  let newtiem={}
  let item = new Date(checktime_form).setFullYear((new Date(checktime_form).getFullYear()-1))
  let item_to = new Date(checktime_to).setFullYear((new Date(checktime_to).getFullYear()-1))
  let time_from='',time_to=''
  if(timetype=="day"){
      time_from = formatDate(new Date(item), "yyyy-MM-dd") + " 00:00:00"
      time_to = formatDate(new Date(item_to), "yyyy-MM-dd") + " 00:00:00"
  }else if(timetype=="month"){
      time_from = formatDate(new Date(item), "yyyy-MM") + "-01 00:00:00"
      time_to = formatDate(new Date(item_to), "yyyy-MM") + "-01 00:00:00"
  }else{
      time_from = formatDate(new Date(item), "yyyy") + "-01-01 00:00:00"
      time_to = formatDate(new Date(item_to), "yyyy") + "-01-01 00:00:00"
  }
  newtiem.fromDate = time_from
  newtiem.toDate = time_to
  return newtiem
}

Regular summary ：

 cell-phone number ：
let zz = /^1\d{10}$/.test("13800138000") // return true It is 

6 Digit verification code ：
/^\d{6}$/.test(this.yznum)

According to the incoming days , Get the date a few days ago

// obtain num The time and date before , //num Is a positive number indicating the time after ,num Negative numbers indicate the time before ,0 Today 
fun_date(num){
    var date1 = new Date();
    var date2 = new Date(date1);
    date2.setDate(date1.getDate() + num);
    var time2 = date2.getFullYear() + "-" + (date2.getMonth() + 1) + "-" + date2.getDate();
    return time2;
}