某个日期距离当前日期相差的天数

实现某个日期距离当前日期相差的天数，常用场景如：已知计划结束日期，计算剩余工期。

const getDiffDate = (targetDate)  => {
    let date1 = new Date(targetDate);
    let date2 = new Date();
    date1 = new Date(date1.getFullYear(), date1.getMonth(), date1.getDate());
    date2 = new Date(date2.getFullYear(), date2.getMonth(), date2.getDate());
    const diff = date1.getTime() - date2.getTime(); //计算出相差的时间戳
    const diffDate = diff / (24 * 60 * 60 * 1000); //计算相关的天数
    return diffDate;
}

// 调用的地方，假设计划结束日期为2024-12-31，计算剩余工期
getDiffDate('2024-12-31'); 

获取当前时间

export function curTime() {
  const now = new Date();
      const year = now.getFullYear();
      const month = (now.getMonth() + 1).toString().padStart(2, '0');
      const day = now.getDate().toString().padStart(2, '0');
      const hour = now.getHours().toString().padStart(2, '0');
      const minute = now.getMinutes().toString().padStart(2, '0');
      const second = now.getSeconds().toString().padStart(2, '0');
      return `${year}-${month}-${day} ${hour}:${minute}:${second}`;
}

获取近12小时的时间

export function last12H() {
  const now = new Date();
      const data = new Date(now.getTime() - 12 * 60 * 60 * 1000);
      const year = data.getFullYear();
      const month = (data.getMonth() + 1).toString().padStart(2, '0');
      const day = data.getDate().toString().padStart(2, '0');
      const hour = data.getHours().toString().padStart(2, '0');
      const minute = data.getMinutes().toString().padStart(2, '0');
      const second = data.getSeconds().toString().padStart(2, '0');
      return `${year}-${month}-${day} ${hour}:${minute}:${second}`;
}

获取近7天的时间

export function last7D() {
  const now = new Date();
      const data = new Date(now.getTime() - 7 * 24 * 60 * 60 * 1000);
      const year = data.getFullYear();
      const month = (data.getMonth() + 1).toString().padStart(2, '0');
      const day = data.getDate().toString().padStart(2, '0');
      const hour = data.getHours().toString().padStart(2, '0');
      const minute = data.getMinutes().toString().padStart(2, '0');
      const second = data.getSeconds().toString().padStart(2, '0');
      return `${year}-${month}-${day} ${hour}:${minute}:${second}`;
}