date-flywen/src/core/format.js

a simple date format javascript library

import { getYear, getMonth, getDate, getHours, getMinutes, getSeconds, getMilliSeconds, getTimeZone } from "../utils/dateGetUtil";
const DEFAULT_PATTERN = "yyyy-MM-dd hh:mm:ss";
function format(pattern, date) {
  if(typeof pattern == "object") {
    date = pattern;
    pattern = DEFAULT_PATTERN;
  }
  if(typeof pattern == "undefined") {
    date = new Date();
    pattern = DEFAULT_PATTERN;
  }
  if(date == null) {
    date = new Date();
  }
  return pattern
    .replace(/yyyy/, getYear(date))
    .replace(/yy/, getYear(date, 2))
    .replace(/MM/, getMonth(date, 2))
    .replace(/M/, getMonth(date))
    .replace(/dd/, getDate(date, 2))
    .replace(/d/, getDate(date))
    .replace(/hh/, getHours(date, 2))
    .replace(/h/, getHours(date))
    .replace(/mm/, getMinutes(date, 2))
    .replace(/m/, getMinutes(date))
    .replace(/ss/, getSeconds(date, 2))
    .replace(/s/, getSeconds(date))
    .replace(/SS/, getMilliSeconds(date,4))
    .replace(/S/, getMilliSeconds(date))
    .replace(/O/, getTimeZone(date));
}
export { format };