js 获取时间区间

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

const timestamp = Date.now();
console.log(timestamp); // 输出当前时间的时间戳（毫秒）

const now = new Date();
const year = now.getFullYear();
const month = now.getMonth() + 1; // 月份从0开始，所以需要加1
const day = now.getDate();
const hours = now.getHours();
const minutes = now.getMinutes();
const seconds = now.getSeconds();

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

const now = new Date();
const oneHourAgo = new Date(now.getTime() - 60 * 60 * 1000);

console.log(`当前时间: ${now}`);
console.log(`一小时前: ${oneHourAgo}`);

const now = new Date();
const oneDayAgo = new Date(now.getTime() - 24 * 60 * 60 * 1000);

console.log(`当前时间: ${now}`);
console.log(`一天前: ${oneDayAgo}`);

const now = new Date();
const oneWeekAgo = new Date(now.getTime() - 7 * 24 * 60 * 60 * 1000);

console.log(`当前时间: ${now}`);
console.log(`一周前: ${oneWeekAgo}`);

const now = new Date();
console.log(now.toLocaleString()); // 格式化为本地时间字符串

const highPrecisionTimestamp = performance.now();
console.log(highPrecisionTimestamp); // 输出高精度时间戳

const now = new Date();
console.log(now.toUTCString()); // 输出UTC时间字符串