javascript - 如何判断A时间是否在B时间和C时间之间？

Question

我尝试过这个，但由于 24 小时循环，它不起作用:

const isBetweenHours = (currentHour, startHour, endHour) => {
  if (currentHour >= startHour && currentHour <= endHour) {
    return true
  }
  return false
}

有效的示例:

currentHour = 7 // 7AM
startHour = 10 // 10AM
endHour = 18 // 6PM
isBetweenHours(currentHour, startHour, endHour)

失败的例子:

currentHour = 22 // 10PM
startHour = 21 // 9PM
endHour = 4 // APM
isBetweenHours(currentHour, startHour, endHour)

Answer 1

如果结束时间小于开始时间，那么我们就在第二天，所以添加 24 以获得真实情况:

const isBetweenHours = (currentHour, startHour, endHour) => {
  if (endHour < startHour) { endHour += 24; }
  if (currentHour >= startHour && currentHour <= endHour) {
    return true
  }
  return false
}