Home > @firebase/firestore > / > Timestamp

Timestamp class

A Timestamp represents a point in time independent of any time zone or calendar, represented as seconds and fractions of seconds at nanosecond resolution in UTC Epoch time.

It is encoded using the Proleptic Gregorian Calendar which extends the Gregorian calendar backwards to year one. It is encoded assuming all minutes are 60 seconds long, i.e. leap seconds are "smeared" so that no leap second table is needed for interpretation. Range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z.

For examples and further specifications, refer to the Timestamp definition.

Signature:

export declare class Timestamp 

Constructors

Constructor	Modifiers	Description
(constructor)(seconds, nanoseconds)		Creates a new timestamp.

Properties

Property	Modifiers	Type	Description
nanoseconds		number	The fractions of a second at nanosecond resolution.*
seconds		number	The number of seconds of UTC time since Unix epoch 1970-01-01T00:00:00Z.

Methods

Method	Modifiers	Description
fromDate(date)	static	Creates a new timestamp from the given date.
fromMillis(milliseconds)	static	Creates a new timestamp from the given number of milliseconds.
isEqual(other)		Returns true if this Timestamp is equal to the provided one.
now()	static	Creates a new timestamp with the current date, with millisecond precision.
toDate()		Converts a Timestamp to a JavaScript Date object. This conversion causes a loss of precision since Date objects only support millisecond precision.
toJSON()		Returns a JSON-serializable representation of this Timestamp.
toMillis()		Converts a Timestamp to a numeric timestamp (in milliseconds since epoch). This operation causes a loss of precision.
toString()		Returns a textual representation of this Timestamp.
valueOf()		Converts this object to a primitive string, which allows Timestamp objects to be compared using the >, <=, >= and > operators.