JavaScript日期格式化与日期校验

JavaScript日期格式化与日期校验

// 日期校验
var validateDate = function (date) {
  // 输出当前时间
  let today = dateFormat(new Date(), 'yyyy-MM-dd')
  if (date > today) {
    return false
  }
  var dates = date.split('-')
  // console.log(dates)
  if (dates.length === 3) {
    let intYear = parseInt(dates[0], 10)
    let intMonth = parseInt(dates[1], 10)
    let intDay = parseInt(dates[2], 10)
    if (isNaN(intYear) || isNaN(intMonth) || isNaN(intDay)) {
      return false
    }
    if (intYear > 2100 || intYear < 1900 || intMonth > 12 || intMonth < 0 || intDay > 31 || intDay < 0) {
      return false
    }
    if (intMonth < 1 || intDay < 1) {
      return false
    }
    if ((intMonth === 4 || intMonth === 6 || intMonth === 9 || intMonth === 11) && intDay > 30) {
      return false
    }
    if ((intYear % 100 === 0 && intYear % 400) || (intYear % 100 && intYear % 4 === 0)) {
      if (intDay > 29) { return false }
    } else {
      if (intDay > 28) { return false }
    }
    return true
  }
  return false
}

// 日期格式化
var dateFormat = function (date, fmt) {
  var o = {
    'M+': date.getMonth() + 1,
    'd+': date.getDate(),
    'h+': date.getHours(),
    'm+': date.getMinutes(),
    's+': date.getSeconds(),
    'q+': Math.floor((date.getMonth() + 3) / 3),
    'S': date.getMilliseconds()
  }
  if (/(y+)/.test(fmt)) {
    fmt = fmt.replace(RegExp.$1, (date.getFullYear() + '').substr(4 - RegExp.$1.length))
  }
  for (var k in o) {
    if (new RegExp('(' + k + ')').test(fmt)) {
      fmt = fmt.replace(RegExp.$1, (RegExp.$1.length === 1) ? (o[k]) : (('00' + o[k]).substr(('' + o[k]).length)))
    }
  }
  return fmt
}