javascript Momentjs 中自午夜以来的分钟数
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Minutes since midnight in Momentjs
提问by bguiz
In pure JS, thiswould be how.
在纯 JS 中，这将是如何。
How can I find out the number of minutes since midnight for a given momentobject (without extracting to Date)?
如何找出给定moment对象自午夜以来的分钟数（不提取到Date）？
- Must take into account DSTs
- Minutes should be rounded
- Must work with local time (not convert to UTC)
- 必须考虑 DST
- 分钟应该四舍五入
- 必须使用本地时间（不转换为 UTC）
回答by Tuan
// Your moment
var mmt = moment();
// Your moment at midnight
var mmtMidnight = mmt.clone().startOf('day');
// Difference in minutes
var diffMinutes = mmt.diff(mmtMidnight, 'minutes');
By default, moment#diff will return number rounded down. If you want the floating point number, pass true as the third argument. Before 2.0.0, moment#diff returned rounded number, not a rounded down number.
默认情况下， moment#diff 将返回向下取整的数字。如果您想要浮点数，请将 true 作为第三个参数传递。在 2.0.0 之前，moment#diff 返回四舍五入的数字，而不是四舍五入的数字。
Consider this pseudocode because I haven't test to see if the difference takes into account DST.
考虑这个伪代码，因为我还没有测试看差异是否考虑了夏令时。
回答by bguiz
This is what I have at the moment:
这就是我目前所拥有的：
if (!moment.isMoment(mmt)) {
return 0;
}
var hh = mmt.get('hour');
var mm = mmt.get('minute');
return hh*60 + mm;
I am not sure if it takes into account various edge cases; comment if this is the case, or provide an alternate answer.
我不确定它是否考虑了各种边缘情况；如果是这种情况，请发表评论，或提供替代答案。
