JS 无依赖获取阴历

[AllanChain]

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This post was originally created at 2020-02-08T13:46:36+08:00

Intl 是个好东西，但是还不是很强大，浏览器支持上也有 Node 和 Android 的小缺憾。

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Based on https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl

const dtf = new Intl.DateTimeFormat('zh-hans-u-ca-chinese')
const gan = '甲乙丙丁戊己庚辛壬癸'
const zhi = '子丑寅卯辰巳午未申酉戌亥';
const yue = '正二三四五六七八九十冬腊';
const ri = ['初', '十', '廿', '三十'];
[year, month, date] = dtf.format(new Date()).split('/');
year--;
year = gan.charAt(year % 10) + zhi.charAt(year % 12);
let dates = '';
if (date % 10)
  dates = new Intl.NumberFormat('zh-hans-u-nu-hanidec').format(date % 10);
dates = ri[Math.floor(date / 10)] + dates;
console.log(`${year}年${yue.charAt(month-1)}月${dates}`);

日的表述还不够标准，就先这样了。