isFormat 表示是否格式化时间格式，，默认为格式化

(function (w) { function $Date (isFormat = true) {

格式化日期 前台传值方式 引用类.dateFormat(1402233166999,"yyyy-MM-dd hh:mm:ss")

this.dateFormat = function (date, fmt = 'yyyy-MM-dd hh:mm:ss') {
  let getDate = new Date(date);
  let o = {
    'M+': getDate.getMonth() + 1,
    'd+': getDate.getDate(),
    'h+': getDate.getHours(),
    'm+': getDate.getMinutes(),
    's+': getDate.getSeconds(),
    'q+': Math.floor(
      (getDate.getMonth() + 3) / 3
    ),
    'S': getDate.getMilliseconds()
  };
  if (/(y+)/.test(fmt)) {
    fmt = fmt.replace(RegExp.$1, (getDate.getFullYear() + '').substr(4 - RegExp.$1.length));
  }
  for (let 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;
};

当前月天数

this.now = isFormat ? this.dateFormat(new Date()) : new Date();

当前日期

this.date = this.dateFormat(new Date()).split(' ')[0];

当前时间

this.time = this.dateFormat(new Date()).split(' ')[1];

当前月

this.month = new Date().getMonth() + 1;

当前消失

this.hours = new Date().getHours();

当前月天数

this.monthDays = (() => {
  let nowMonth = new Date().getMonth(); // 当前月
  let nowYear = new Date().getYear(); // 当前年
  let monthStartDate = new Date(nowYear, nowMonth, 1);
  let monthEndDate = new Date(nowYear, nowMonth + 1, 1);
  let days = (monthEndDate - monthStartDate) / (1000 * 60 * 60 * 24);
  return days;
})();

本周的开始日期和结束日日期

this.endDayOfWeek = (() => {
  let nowMonth = new Date().getMonth(); // 当前月
  let nowDay = new Date().getDate(); // 当前日
  let nowDayOfWeek = new Date().getDay(); // 今天本周的第几天
  let day = nowDayOfWeek || 7;

  const start = new Date(new Date().getFullYear(), nowMonth, nowDay - day + 1);
  const starts = new Date(new Date().getFullYear(), nowMonth, nowDay - day + 1);
  const end = new Date(new Date().getFullYear(), nowMonth, nowDay + 7 - day);
  const ends = new Date(new Date().getFullYear(), nowMonth, nowDay + 7 - day);

  starts.setHours(23);
  starts.setMinutes(59);
  starts.setSeconds(59);

  ends.setHours(23);
  ends.setMinutes(59);
  ends.setSeconds(59);

  const firstDay = isFormat ? this.dateFormat(start) : start;
  const firstDays = isFormat ? this.dateFormat(starts) : starts;
  const lastDay = isFormat ? this.dateFormat(end) : end;
  const lastDays = isFormat ? this.dateFormat(ends) : ends;
  return {firstDay, firstDays, lastDay, lastDays};
})();

当天开始时间

this.todayBegin = (() => {
  const now = new Date();
  now.setHours(0);
  now.setMinutes(0);
  now.setSeconds(0);
  return isFormat ? this.dateFormat(now) : now;
})();

当天59时59分59秒

this.todayEnd = (() => {
  const now = new Date();
  now.setHours(23);
  now.setMinutes(59);
  now.setSeconds(59);
  return isFormat ? this.dateFormat(now) : now;
})();

指定月的最后第一天和最后一天

this.getNowTheMothEnd = (M) => {
  if (typeof M !== 'number') {
    throw new Error('输入数字');
  }
  if (M < 0 || M > 12) {
    console.error('日期大于1小于12');
    return false;
  }

  const now = new Date();
  let y = now.getFullYear();
  let m = M - 1;

  const firstDay = new Date(y, m, 1);
  const firstDays = new Date(y, m, 1);
  firstDays.setHours(23);
  firstDays.setMinutes(59);
  firstDays.setSeconds(59);

  const lastDay = new Date(y, m + 1, 0);
  const lastDays = new Date(y, m + 1, 0);
  lastDays.setHours(23);
  lastDays.setMinutes(59);
  lastDays.setSeconds(59);

  return {
    firstDay: isFormat ? this.dateFormat(firstDay) : firstDay,
    firstDays: isFormat ? this.dateFormat(firstDays) : firstDays,
    lastDay: isFormat ? this.dateFormat(lastDay) : lastDay,
    lastDays: isFormat ? this.dateFormat(lastDays) : lastDays
  };
};

当月的最后第一天和最后一天

this.nowMothEnd = (() => {
  const now = new Date();
  let y = now.getFullYear();
  let m = now.getMonth();

  const firstDay = new Date(y, m, 1);
  const firstDays = new Date(y, m, 1);
  firstDays.setHours(23);
  firstDays.setMinutes(59);
  firstDays.setSeconds(59);

  const lastDay = new Date(y, m + 1, 0);
  const lastDays = new Date(y, m + 1, 0);
  lastDays.setHours(23);
  lastDays.setMinutes(59);
  lastDays.setSeconds(59);

  return {
    firstDay: isFormat ? this.dateFormat(firstDay) : firstDay,
    firstDays: isFormat ? this.dateFormat(firstDays) : firstDays,
    lastDay: isFormat ? this.dateFormat(lastDay) : lastDay,
    lastDays: isFormat ? this.dateFormat(lastDays) : lastDays
  };
})();

今年的第一天和今年的最后一天

this.nowYearsEnd = (() => {
  const now = new Date();
  let y = now.getFullYear();
  let m = now.getMonth();
  console.log(m);

  const firstDay = new Date(y, 0, 1);
  const firstDays = new Date(y, 0, 1);
  firstDays.setHours(23);
  firstDays.setMinutes(59);
  firstDays.setSeconds(59);

  const lastDay = new Date(y, 12, 0);
  const lastDays = new Date(y, 12, 0);
  lastDays.setHours(23);
  lastDays.setMinutes(59);
  lastDays.setSeconds(59);
  return {
    firstDay: isFormat ? this.dateFormat(firstDay) : firstDay,
    firstDays: isFormat ? this.dateFormat(firstDays) : firstDays,
    lastDay: isFormat ? this.dateFormat(lastDay) : lastDay,
    lastDays: isFormat ? this.dateFormat(lastDays) : lastDays
  };
})();

指定年的第一天和今年的最后一天

this.nowTheYearsEnd = (Y) => {
  const now = new Date();
  let y = Y;
  let m = now.getMonth();
  console.log(m);

  const firstDay = new Date(y, 0, 1);
  const firstDays = new Date(y, 0, 1);
  firstDays.setHours(23);
  firstDays.setMinutes(59);
  firstDays.setSeconds(59);

  const lastDay = new Date(y, 12, 0);
  const lastDays = new Date(y, 12, 0);
  lastDays.setHours(23);
  lastDays.setMinutes(59);
  lastDays.setSeconds(59);
  return {
    firstDay: isFormat ? this.dateFormat(firstDay) : firstDay,
    firstDays: isFormat ? this.dateFormat(firstDays) : firstDays,
    lastDay: isFormat ? this.dateFormat(lastDay) : lastDay,
    lastDays: isFormat ? this.dateFormat(lastDays) : lastDays
  };
};

当前时间最近前N天

this.getNowBeforeNday = (N) => {
  const now = new Date().getTime();
  const before = new Date().getTime() - (24 * 60 * 60 * 1000) * N;
  return {
    now: isFormat ? this.dateFormat(new Date(now)) : new Date(now),
    before: isFormat ? this.dateFormat(new Date(before)) : new Date(before)
  };
};

当前时间后面N天

this.getNowAfterNday = (N) => {
  const now = new Date().getTime();
  const after = new Date().getTime() + (24 * 60 * 60 * 1000) * N;
  return {
    now: isFormat ? this.dateFormat(new Date(now)) : new Date(now),
    after: isFormat ? this.dateFormat(new Date(after)) : new Date(after)
  };
};

} w.$Date = $Date; })(window); const date = window.$Date; export default $Date = date; module.exports = { date };