js时间代码

let now = new Date();
console.log(now); // 输出当前日期和时间

let year = now.getFullYear(); // 年
let month = now.getMonth() + 1; // 月（注意月份是从0开始的）
let day = now.getDate(); // 日
let hours = now.getHours(); // 小时
let minutes = now.getMinutes(); // 分钟
let seconds = now.getSeconds(); // 秒

console.log(`${year}-${month}-${day} ${hours}:${minutes}:${seconds}`);

let specificDate = new Date(2023, 9, 1, 12, 0, 0); // 2023年10月1日12点整
console.log(specificDate);

let timestamp = Date.now(); // 获取当前时间的时间戳
let dateFromTimestamp = new Date(timestamp); // 从时间戳创建 Date 对象

function formatDate(date) {
    let year = date.getFullYear();
    let month = ('0' + (date.getMonth() + 1)).slice(-2);
    let day = ('0' + date.getDate()).slice(-2);
    let hours = ('0' + date.getHours()).slice(-2);
    let minutes = ('0' + date.getMinutes()).slice(-2);
    let seconds = ('0' + date.getSeconds()).slice(-2);

    return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
}

console.log(formatDate(now));

let options = { timeZone: 'Asia/Shanghai', year: 'numeric', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit', second: '2-digit' };
let formatter = new Intl.DateTimeFormat('zh-CN', options);
console.log(formatter.format(now)); // 输出上海时区的当前时间

// 使用 moment.js 示例
let moment = require('moment');
let preciseTime = moment().valueOf(); // 获取当前时间的精确时间戳（毫秒级）
console.log(preciseTime);