ES5 实现获取本周、上周、本月、上月、本季度的时间处理工具类

曾经终败给现在 2023-02-16 06:54 30阅读 0赞

### 简介 ###

> 在日常工作日我们前端有时候会配合后端小伙伴做统计操作，可能会需要获取一些特殊日期时间，所以经过整合出一个工具类分享给大家，喜欢的给个star，给个小小的鼓励哈!

> 工具类 dateFormatUtil.js

// 当前日期
      let now = new Date();
      // 今天本周的第几天
      let nowDayOfWeek = now.getDay();
      // 当前日
      let nowDay = now.getDate();
      // 当前月
      let nowMonth = now.getMonth();
      // 当前年
      let nowYear = now.getFullYear();
      nowYear += (nowYear < 2000) ? 1900 : 0;
      // 上月日期
      let lastMonthDate = new Date();
      lastMonthDate.setDate(1);
      lastMonthDate.setMonth(lastMonthDate.getMonth() - 1);
      let lastMonth = lastMonthDate.getMonth();
      // 日期格式化,时间戳 时分秒 hh:mm:ss
      export function formatTimeStamp(date, fmt = 'yyyy-MM-dd hh:mm:ss') {
        
        if(!date) {
        
          return '-';
        }
        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 : padLeftZero(str));
          }
        }
        return fmt;
      }
      function padLeftZero(str) {
        
        return ('00' + str).substr(str.length);
      }
      // 获取当前时间
      export function getNowDate() {
        
        return formatTimeStamp(new Date());
      }
      // 获得某月的天数
      export function getMonthDays(myMonth) {
        
        let monthStartDate = new Date(nowYear, myMonth, 1);
        let monthEndDate = new Date(nowYear, myMonth + 1, 1);
        let days = (monthEndDate - monthStartDate) / (1000 * 60 * 60 * 24);
        return days;
      }
      // 获得本季度的开始月份
      export function getQuarterStartMonth() {
        
        let quarterStartMonth = 0;
        if (nowMonth < 3) {
        
          quarterStartMonth = 0;
        }
        if (2 < nowMonth && nowMonth < 6) {
        
          quarterStartMonth = 3;
        }
        if (5 < nowMonth && nowMonth < 9) {
        
          quarterStartMonth = 6;
        }
        if (nowMonth > 8) {
        
          quarterStartMonth = 9;
        }
        return quarterStartMonth;
      }
      // 获得本周的开始日期
      export function getWeekStartDate() {
        
        let weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek);
        return formatTimeStamp(weekStartDate);
      }
      // 获得本周的结束日期
      export function getWeekEndDate() {
        
        let weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek));
        return formatTimeStamp(weekEndDate);
      }
      // 获得上周的开始日期
      export function getLastWeekStartDate() {
        
        let weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek - 6);
        return formatTimeStamp(weekStartDate);
      }
      // 获得上周的结束日期
      export function getLastWeekEndDate() {
        
        let weekEndDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek);
        return formatTimeStamp(weekEndDate);
      }
      // 获得本月的开始日期
      export function getMonthStartDate() {
        
        let monthStartDate = new Date(nowYear, nowMonth, 1);
        return formatTimeStamp(monthStartDate);
      }
      // 获得本月的结束日期
      export function getMonthEndDate() {
        
        let monthEndDate = new Date(nowYear, nowMonth, getMonthDays(nowMonth));
        return formatTimeStamp(monthEndDate);
      }
      // 获得上月开始时间
      export function getLastMonthStartDate() {
        
        let lastMonthStartDate = new Date(nowYear, lastMonth, 1);
        return formatTimeStamp(lastMonthStartDate);
      }
      // 获得上月结束时间
      export function getLastMonthEndDate() {
        
        let lastMonthEndDate = new Date(nowYear, lastMonth, getMonthDays(lastMonth));
        return formatTimeStamp(lastMonthEndDate);
      }
      // 获得本季度的开始日期
      export function getQuarterStartDate() {
        
        let quarterStartDate = new Date(nowYear, getQuarterStartMonth(), 1);
        return formatTimeStamp(quarterStartDate);
      }
      // 或的本季度的结束日期
      export function getQuarterEndDate() {
        
        let quarterEndMonth = getQuarterStartMonth() + 2;
        let quarterStartDate = new Date(nowYear, quarterEndMonth, getMonthDays(quarterEndMonth));
        return formatTimeStamp(quarterStartDate);
      }
      // 当时时间减去天数
      export function getNowDateSubtraction(day) {
        
        let nowDateSubtraction = new Date().setDate((new Date().getDate() - day));
        return formatTimeStamp(nowDateSubtraction);
      }

> 测试脚本

console.log('上周开始', getLastWeekStartDate());
    console.log('上周结束', getLastWeekEndDate());
    console.log('上月开始', getLastMonthStartDate());
    console.log('上月结束', getLastMonthEndDate());
    console.log('本月开始', getMonthStartDate());
    console.log('当前时间', getNowDate());
    console.log('最近30天开始', getNowDateSubtraction(30));
    console.log('最近30天结束', getNowDate());
    console.log('最近一年的开始时间', getNowDateSubtraction(365));

> 运行结果  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI1MDQwMTU1_size_16_color_FFFFFF_t_70]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI1MDQwMTU1_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200609111441159.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI1MDQwMTU1,size_16,color_FFFFFF,t_70