MomentJS提供了一个称为持续时间的重要功能，可以处理给定单位的时间长度.在本章中，您将详细了解这一点.
下表显示了不同单位的持续时间可用方法使用时刻持续时间:
| Method | Syntax |
|---|---|
| Creating | moment.duration(Number, String); moment.duration(Number); moment.duration(Object); moment.duration(String); |
| Clone | moment.duration().clone(); |
| Humanize | moment.duration().humanize(); |
| Milliseconds | moment.duration().milliseconds(); moment.duration().asMilliseconds(); |
| Seconds | moment.duration().seconds(); moment.duration().asSeconds(); |
| Minutes | moment.duration().minutes(); moment.duration().asMinutes(); |
| Hours | moment.duration().hours(); moment.duration().asHours(); |
| Days | moment.duration().days(); moment.duration().asDays(); |
| Weeks | moment.duration().weeks(); moment.duration().asWeeks(); |
| Months | moment.duration().months(); moment.duration().asMonths(); |
| Years | moment.duration().years(); moment.duration().asYears(); |
| Add Time | moment.duration().add(Number, String); moment.duration().add(Number); moment.duration().add(Duration); moment.duration().add(Object); |
| Subtract Time | moment.duration().subtract(Number, String); moment.duration().subtract(Number); moment.duration().subtract(Duration); moment.duration().subtract(Object); |
| Using Duration with Diff | var duration = moment.duration(x.diff(y)) |
| As Unit of Time | moment.duration().as(String); |
| Get Unit of Time | duration.get('hours'); duration.get('minutes'); duration.get('seconds'); duration.get('milliseconds'); |
| As JSON | moment.duration().toJSON(); |
| Is a Duration | moment.isDuration(obj); |
| As ISO 8601 String | moment.duration().toISOString(); |
| Locale | moment.duration().locale(); moment.duration().locale(String); |
