插件_日期_lunar-calendar公历农历转换

现在存在某需求，需要将公历、农历日期进行相互转换，在此借助lunar-calendar插件完成。

下载

[1] 通过npm安装
```
npm install lunar-calendar
```

[2]通过文件方式引入

<script type="text/javascript" src="lib/LunarCalendar.min.js"></script>

此处我下载了LunarCalendar.min.js文件引入

 /**
 * 农历（阴历）万年历
 * LunarCalendar；NPM NAME:lunar-calendar
 * vervison : v0.1.4
 * Github : https://github.com/zzyss86/LunarCalendar
 * HomePage : http://www.tuijs.com/
 * Author : JasonZhou
 * Email : zzyss86@qq.com
 */
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define?define(function(){return J}):"object"==typeof exports?module.exports=J:window.LunarCalendar=J}();

使用

引入js文件之后，在window全局对象上添加了LunarCalendar对象，公农历转化的方法就是该对象的属性，可以全局作用域直接调用。

将公历转换为农历

语法

/* 
  @param {Number} year 公历年 范围[1891-2100]
  @param {Number} month 公历月 范围[1-12]
  @param {Number} day 公历日 范围[1-31]
*/
LunarCalendar.solarToLunar(year,month,day)

返回值
在这里插入图片描述
举例说明

const obj = window.LunarCalendar.solarToLunar(2023, 10,1)
console.log(`今天的农历日期是${obj.lunarYear}年${obj.lunarMonthName}${obj.lunarDayName}日` ) // 今天的农历日期是2023年八月十七日
console.log(`今天是${obj.solarFestival}`) // 今天是国庆节 世界音乐日 国际老人节

将农历转换为公历

语法

/*
  @param {Number} year 农历年 范围[1891-2100]
  @param {Number} month 农历月 范围[1-13]（有闰月情况，比如当前闰9月，10表示闰9月，11表示10月）
  @param {Number} day 农历日 范围[1-30]
*/
LunarCalendar.lunarToSolar(year,month,day)

返回值
在这里插入图片描述

问题-month参数值

因为农历存在闰月的情况，因此month在传旨时的取值范围是1-13。

在进行转换时需要先知道今年哪月是闰月！month的参数值是否要+1？

举例说明

window.LunarCalendar.lunarToSolar(2023, 8,17)

如上农历8月17日转化为公历为10月1日，但是结果为9月1日！

原因是在2023年润2月！

正确流程

[1] 先获取今年润几月
[2] 确定month传值

示例

function lunarToSolar(year, month, day) {
  const { lunarLeapMonth } = LunarCalendar.calendar(year,month).monthData[0] // 润几月
  return window.LunarCalendar.lunarToSolar(year, month > lunarLeapMonth ? month+1 : month  ,day)
}
const date = lunarToSolar(2023, 8, 17)
console.log(`今天公历日期为${date.year}年${date.month}月${date.day}日`) // 今天公历日期为2023年10月1日