const date = new Date();
const date1 = new Date(2024, 8, 13); // 注意：月份從0開始
const date2 = new Date("2024-09-13T10:20:30Z");
const date3 = new Date(1694596830000); // 時(shí)間戳

const date = new Date();
console.log(date.getFullYear()); // 獲取年份
console.log(date.getMonth()); // 獲取月份，0表示1月，11表示12月
console.log(date.getDate()); // 獲取當(dāng)月的某一天
console.log(date.getHours()); // 獲取小時(shí)
console.log(date.getMinutes()); // 獲取分鐘
console.log(date.getSeconds()); // 獲取秒
console.log(date.getDay()); // 獲取星期幾，0表示星期天

const date = new Date();
console.log(date.toISOString()); // 2024-09-13T10:20:30.000Z
console.log(date.toDateString()); // Fri Sep 13 2024
console.log(date.toLocaleDateString('zh-CN')); // 2024/9/13
console.log(date.toLocaleString('en-US')); // 9/13/2024, 10:20:30 AM

function formatDate(date) {
  const year = date.getFullYear();
  const month = String(date.getMonth() + 1).padStart(2, '0'); // 月份加1，確保是兩位數(shù)
  const day = String(date.getDate()).padStart(2, '0');
  const hours = String(date.getHours()).padStart(2, '0');
  const minutes = String(date.getMinutes()).padStart(2, '0');
  const seconds = String(date.getSeconds()).padStart(2, '0');
  return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
}

const date = new Date();
console.log(formatDate(date)); // 2024-09-13 10:20:30

function formatDate(date, format = "yyyy-MM-dd HH:mm:ss") {
    const year = date.getFullYear();
    const month = date.getMonth() + 1;
    const day = date.getDate();
    const hours = date.getHours();
    const minutes = date.getMinutes();
    const seconds = date.getSeconds();
    const toSymbol = () => {
      return hours > 12 ? "PM" : "AM";
    };
    const hasSymbol = format.indexOf('a') > -1
    const symbols = {
      yyyy: year,
      MM: `${month}`.padStart(2, "0"),
      dd: `${day}`.padStart(2, "0"),
      HH: `${hours}`.padStart(2, "0"),
      hh: hasSymbol && hours > 12 ? hours - 12 : hours,
      mm: `${minutes}`.padStart(2, "0"),
      ss: `${seconds}`.padStart(2, "0"),
      // a 表示12小時(shí)制
      a: toSymbol(),
    };
    let time = format;

    Object.keys(symbols).forEach((key) => {
      time = time.replace(key, symbols[key]);
    });

    return time;
}

// 2024-10-26 PM 1:06:43 12 小時(shí)制
console.log(formatDate(new Date(), "yyyy-MM-dd a hh:mm:ss"));

const date = new Date();
const formatter = new Intl.DateTimeFormat('zh-CN', {
  year: 'numeric',
  month: '2-digit',
  day: '2-digit',
  hour: '2-digit',
  minute: '2-digit',
  second: '2-digit',
  hour12: false,
});
console.log(formatter.format(date)); // 2024/09/13 10:20:30

const date = new Date();
console.log(date.toLocaleString('en-US', { timeZone: 'America/New_York' })); // 轉(zhuǎn)換為紐約時(shí)間

// 安裝 moment-timezone：npm install moment-timezone
const moment = require('moment-timezone');
const newYorkTime = moment.tz("America/New_York").format('YYYY-MM-DD HH:mm:ss');
console.log(newYorkTime); // 紐約當(dāng)前時(shí)間

const dayjs = require('dayjs');
const utc = require('dayjs/plugin/utc');
const timezone = require('dayjs/plugin/timezone');
dayjs.extend(utc);
dayjs.extend(timezone);

const newYorkTime = dayjs().tz("America/New_York").format('YYYY-MM-DD HH:mm:ss');
console.log(newYorkTime); // 紐約當(dāng)前時(shí)間

// 安裝 Moment.js：npm install moment
const moment = require('moment');
const date = moment().format('YYYY-MM-DD HH:mm:ss');
console.log(date); // 2024-09-13 10:20:30

// 安裝 Day.js：npm install dayjs
const dayjs = require('dayjs');
const date = dayjs().format('YYYY-MM-DD HH:mm:ss');
console.log(date); // 2024-09-13 10:20:30

// 安裝 date-fns：npm install date-fns
const { format } = require('date-fns');
const date = new Date();
console.log(format(date, 'yyyy-MM-dd HH:mm:ss')); // 2024-09-13 10:20:30