JS实现获取各种格式的时间

// 获取当前时间
let currentTime = new Date();
// 获取年份
let year = currentTime.getFullYear();
// 获取月份（注意月份是从0开始计数的，所以需要加1）
let month = currentTime.getMonth() + 1;
// 获取日期
let day = currentTime.getDate();
// 获取小时
let hours = currentTime.getHours();
// 获取分钟
let minutes = currentTime.getMinutes();
// 获取秒数
let seconds = currentTime.getSeconds();
// 获取毫秒数
let milliseconds = currentTime.getMilliseconds();
// 格式化时间为 YYYY-MM-DD
let formattedDate = `${year}-${month.toString().padStart(2, '0')}-${day.toString().padStart(2, '0')}`;
// 格式化时间为 HH:MM:SS
let formattedTime = `${hours.toString().padStart(2, '0')}:${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`;
// 格式化时间为 YYYY-MM-DD HH:MM:SS
let formattedDateTime = `${formattedDate} ${formattedTime}`;
// 格式化时间为 MM/DD/YYYY
let formattedDateUS = `${month.toString().padStart(2, '0')}/${day.toString().padStart(2, '0')}/${year}`;
// 格式化时间为 HH:MM AM/PM
let formattedTime12Hour = `${hours % 12 || 12}:${minutes.toString().padStart(2, '0')} ${hours < 12 ? 'AM' : 'PM'}`;
console.log('当前时间：', currentTime);
console.log('年份：', year);
console.log('月份：', month);
console.log('日期：', day);
console.log('小时：', hours);
console.log('分钟：', minutes);
console.log('秒数：', seconds);
console.log('毫秒数：', milliseconds);
console.log('格式化日期：', formattedDate);
console.log('格式化时间：', formattedTime);
console.log('格式化日期时间：', formattedDateTime);
console.log('格式化日期（美国格式）：', formattedDateUS);
console.log('格式化12小时制时间：', formattedTime12Hour);

// 获取昨天的日期
let yesterday = new Date();
yesterday.setDate(yesterday.getDate() - 1);
// 获取明天的日期
let tomorrow = new Date();
tomorrow.setDate(tomorrow.getDate() + 1);
// 获取本周的开始日期和结束日期
let today = new Date();
let startOfWeek = new Date(today.setDate(today.getDate() - today.getDay()));
let endOfWeek = new Date(today.setDate(today.getDate() - today.getDay() + 6));
// 获取上周的开始日期和结束日期
let startOfLastWeek = new Date(startOfWeek);
startOfLastWeek.setDate(startOfLastWeek.getDate() - 7);
let endOfLastWeek = new Date(endOfWeek);
endOfLastWeek.setDate(endOfLastWeek.getDate() - 7);
// 获取下周的开始日期和结束日期
let startOfNextWeek = new Date(startOfWeek);
startOfNextWeek.setDate(startOfNextWeek.getDate() + 7);
let endOfNextWeek = new Date(endOfWeek);
endOfNextWeek.setDate(endOfNextWeek.getDate() + 7);
console.log('昨天的日期：', yesterday);
console.log('明天的日期：', tomorrow);
console.log('本周的开始日期：', startOfWeek);
console.log('本周的结束日期：', endOfWeek);
console.log('上周的开始日期：', startOfLastWeek);
console.log('上周的结束日期：', endOfLastWeek);
console.log('下周的开始日期：', startOfNextWeek);
console.log('下周的结束日期：', endOfNextWeek);

function getDateRange() {
  let today = new Date();
  let yesterday = new Date();
  yesterday.setDate(yesterday.getDate() - 1);
  let tomorrow = new Date();
  tomorrow.setDate(tomorrow.getDate() + 1);
  let startOfWeek = new Date(today.setDate(today.getDate() - today.getDay()));
  let endOfWeek = new Date(today.setDate(today.getDate() - today.getDay() + 6));
  let startOfLastWeek = new Date(startOfWeek);
  startOfLastWeek.setDate(startOfLastWeek.getDate() - 7);
  let endOfLastWeek = new Date(endOfWeek);
  endOfLastWeek.setDate(endOfLastWeek.getDate() - 7);
  let startOfNextWeek = new Date(startOfWeek);
  startOfNextWeek.setDate(startOfNextWeek.getDate() + 7);
  let endOfNextWeek = new Date(endOfWeek);
  endOfNextWeek.setDate(endOfNextWeek.getDate() + 7);
  return {
    yesterday,
    tomorrow,
    startOfWeek,
    endOfWeek,
    startOfLastWeek,
    endOfLastWeek,
    startOfNextWeek,
    endOfNextWeek,
  };
}
// 调用函数获取日期范围
let dateRange = getDateRange();
console.log('昨天的日期：', dateRange.yesterday);
console.log('明天的日期：', dateRange.tomorrow);
console.log('本周的开始日期：', dateRange.startOfWeek);
console.log('本周的结束日期：', dateRange.endOfWeek);
console.log('上周的开始日期：', dateRange.startOfLastWeek);
console.log('上周的结束日期：', dateRange.endOfLastWeek);
console.log('下周的开始日期：', dateRange.startOfNextWeek);
console.log('下周的结束日期：', dateRange.endOfNextWeek);