向上/向下舍入一个 momentjs 时刻到最近的分钟 [英] round up/ round down a momentjs moment to nearest minute

问题描述

如何将 momentjs 时刻向上/向下舍入到最接近的分钟?

我已经检查了 docs，但似乎没有针对此的方法.>

请注意，我不希望将字符串四舍五入到最接近的分钟，我希望返回一个 moment(或就地修改，两者都可以).我宁愿不必转换为字符串，也不必转换回来.

谢谢.

<小时>

根据要求，这里有一些代码:

var now = new moment(new Date());如果(现在.秒()> 0){now.add('分钟', -1);}现在.秒(0);

如您所见，我已经设法手动舍入了此处的时间，但这似乎相当笨拙.就在以更优雅的方式完成此操作之后.

解决方案

要凑整，您需要添加一分钟然后 四舍五入.要向下舍入，只需使用 startOf 方法.

注意使用三元运算符检查时间是否应该四舍五入(例如，点上的 13:00:00 不需要四舍五入).

四舍五入到最接近的分钟

var m = moment('2017-02-17 12:01:01');var roundDown = m.startOf('minute');console.log(roundDown.toString());//输出 2017 年 2 月 17 日星期二 12:01:00 GMT+0000var m = moment('2017-02-17 12:01:01');var roundUp = m.second() ||毫秒()?m.add(1, 'minute').startOf('minute') : m.startOf('minute');console.log(roundUp.toString());//输出 2017 年 2 月 17 日星期二 12:02:00 GMT+0000

四舍五入到最接近的小时

var m = moment('2017-02-17 12:59:59');var roundDown = m.startOf('小时');console.log(roundDown.toString());//输出 2017 年 2 月 17 日星期二 12:00:00 GMT+0000var m = moment('2017-02-17 12:59:59');var roundUp = m.minute() ||m.second() ||毫秒()?m.add(1, 'hour').startOf('hour') : m.startOf('hour');console.log(roundUp.toString());//输出 2017 年 2 月 17 日星期二 13:00:00 GMT+0000

How do you round up/ round down a momentjs moment to nearest minute?

I have checked the docs, but there doesn't appear to be a method for this.

Note that I do not want a string rounded to the nearest minute, I want a moment returned (or modified in place, either is fine). I prefer not to have to convert to a string, and the convert back too.

Thanks.

---

As requested, here is some code:

var now = new moment(new Date());

if (now.seconds() > 0) {
    now.add('minutes', -1);
}

now.seconds(0);

as you can see, I have managed to manually round down the moment here, but it seems rather hacky. Just after a more elegant way of accomplishing this.

解决方案

To round up, you need to add a minute and then round it down. To round down, just use the startOf method.

Note the use of a ternary operator to check if the time should be rounded (for instance, 13:00:00 on the dot doesn't need to be rounded).

Round up/down to the nearest minute

var m = moment('2017-02-17 12:01:01');
var roundDown = m.startOf('minute');
console.log(roundDown.toString()); // outputs Tue Feb 17 2017 12:01:00 GMT+0000

var m = moment('2017-02-17 12:01:01');
var roundUp = m.second() || m.millisecond() ? m.add(1, 'minute').startOf('minute') : m.startOf('minute');
console.log(roundUp.toString());  // outputs Tue Feb 17 2017 12:02:00 GMT+0000

Round up/down to the nearest hour

var m = moment('2017-02-17 12:59:59');
var roundDown = m.startOf('hour');
console.log(roundDown.toString()); // outputs Tue Feb 17 2017 12:00:00 GMT+0000

var m = moment('2017-02-17 12:59:59');
var roundUp = m.minute() || m.second() || m.millisecond() ? m.add(1, 'hour').startOf('hour') : m.startOf('hour');
console.log(roundUp.toString());  // outputs Tue Feb 17 2017 13:00:00 GMT+0000

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