js获取timestamp

// 获取当前时间的 timestamp
let timestamp = Date.now(); // 返回自 1970 年以来的毫秒数

// 或者
let date = new Date();
timestamp = date.getTime(); // 同样返回自 1970 年以来的毫秒数

// 创建一个 UTC 时间戳
let utcTimestamp = Date.UTC(2023, 0, 1); // 注意月份是从 0 开始的，所以 0 表示一月

// 显示为本地时间
let localDate = new Date(utcTimestamp);
console.log(localDate.toLocaleString());

// 获取当前时间的毫秒级时间戳
let currentTimestamp = Date.now();
console.log("Current timestamp in milliseconds:", currentTimestamp);

// 将毫秒级时间戳转换为日期对象
let dateFromTimestamp = new Date(currentTimestamp);
console.log("Date from timestamp:", dateFromTimestamp);

// 创建一个特定时间的日期对象，并获取其时间戳
let specificDate = new Date('2023-01-01T00:00:00Z');
let specificTimestamp = specificDate.getTime();
console.log("Specific timestamp in milliseconds:", specificTimestamp);