Mutates the original moment by adding time.
the key of what time you want to add (eg "years" / "hours" etc)
the amount you want to add
Mutates the original moment by adding time.
the amount you want to add
the key of what time you want to add (eg "years" / "hours" etc)
Mutates the original moment by adding time.
the key of what time you want to add (eg "years" / "hours" etc)
the amount you want to add
Mutates the original moment by adding time.
an object literal that describes multiple different keys at the same time {days:7,months:1}
Mutates the original moment by adding time.
a length of time
string
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boolean
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string
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Date
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