TimeExtent | API Reference | ArcGIS Maps SDK for JavaScript 4.31

A period of time with a definitive start and end date. Time extent is used to display or query features that fall within the specified time period. To represent an instant of time, set the start and end times to the same date.

When creating a JavaScript Date, be mindful that most constructors will create a date with respect to your local timezone rather than UTC (i.e. universal time). To create a date with respect to UTC, use the UTC method on the Date object.

Example

// Represents the data for the month of Jan, 1970
const timeExtent = new TimeExtent({
  start: new Date(Date.UTC(1970, 0, 1, 6, 30)),
  end: new Date(Date.UTC(1970, 0, 31, 6, 30))
});

Constructors

TimeExtent Constructor new TimeExtent(properties)

Parameter

properties Object

optional

See the properties for a list of all the properties that may be passed into the constructor.

Example

// Typical usage
// Represents the data for the month of Jan, 1970
const timeExtent = new TimeExtent({
  start: new Date(Date.UTC(1970, 0, 1, 6, 30)),
  end: new Date(Date.UTC(1970, 0, 31, 6, 30))
});

Property Overview

Any properties can be set, retrieved or listened to. See the Watch for changes topic.

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Type	Summary	Class
String	The name of the class.	Accessor
Date	The end time of the time extent.	TimeExtent
Date	The start time of the time extent.	TimeExtent

Property Details

declaredClass Inherited Property declaredClass Stringreadonly Inherited from Accessor

The name of the class. The declared class name is formatted as esri.folder.className.

end Property end Date

The end time of the time extent.

Default Value:null

start Property start Date

The start time of the time extent.

Default Value:null

Method Overview

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Return Type	Summary	Class
	Adds one or more handles which are to be tied to the lifecycle of the object.	Accessor
TimeExtent	Creates a deep clone of TimeExtent object.	TimeExtent
TimeExtent	Expands the TimeExtent so that the start and end dates are rounded down and up, respectively, to the parsed time unit.	TimeExtent
*	Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product.	TimeExtent
Boolean	Returns true if a named group of handles exist.	Accessor
TimeExtent	Returns the time extent resulting from the intersection of a given time extent and parsed time extent.	intersection
	Removes a group of handles owned by the object.	Accessor
Object	Converts an instance of this class to its ArcGIS portal JSON representation.	TimeExtent
TimeExtent	Returns the time extent resulting from the union of the current time extent and a given time extent.	union

Method Details

addHandles Inherited Method addHandles(handleOrHandles, groupKey) Inherited from Accessor

Adds one or more handles which are to be tied to the lifecycle of the object. The handles will be removed when the object is destroyed.

// Manually manage handles
const handle = reactiveUtils.when(
  () => !view.updating,
  () => {
    wkidSelect.disabled = false;
  },
  { once: true }
);

this.addHandles(handle);

// Destroy the object
this.destroy();

Parameters

handleOrHandles WatchHandle|WatchHandle []

Handles marked for removal once the object is destroyed.

groupKey *

optional

Key identifying the group to which the handles should be added. All the handles in the group can later be removed with Accessor.removeHandles(). If no key is provided the handles are added to a default group.

clone Method clone(){TimeExtent}

Creates a deep clone of TimeExtent object.

Returns

Type	Description
TimeExtent	A new instance of a TimeExtent object equal to the object used to call `.clone()`.

expandTo Method expandTo(unit, timeZone){TimeExtent}

Expands the TimeExtent so that the start and end dates are rounded down and up, respectively, to the parsed time unit.

Parameters

unit String

The time unit to align the start and end dates.

timeZone String

The time zone in which progressing will occur. The default is "system".

Possible Values:"system"|"unknown"

Returns

Type	Description
TimeExtent	A new expanded TimeExtent.

See also

Sample - TimeSlider widget

Examples

// Expand a time extent to a decade.
const extent = new TimeExtent({
  start: new Date(2012, 3, 5),
  end: new Date(2019, 0, 4)
});
const decade = extent.expandTo("decades");
// decade is: 1/1/2010 to 1/1/2020

// Expand a time extent to the nearest month.
const extent = new TimeExtent({
  start: new Date(2012, 3, 5),
  end: new Date(2019, 0, 4)
});
const expandToMonth = extent.expandTo("months");
// expandToMonth is: 4/1/2012 to 2/1/2019

fromJSON Method fromJSON(json){*}static

Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product. The object passed into the input json parameter often comes from a response to a query operation in the REST API or a toJSON() method from another ArcGIS product. See the Using fromJSON() topic in the Guide for details and examples of when and how to use this function.

Parameter

json Object

A JSON representation of the instance in the ArcGIS format. See the ArcGIS REST API documentation for examples of the structure of various input JSON objects.

Returns

Type	Description
*	Returns a new instance of this class.

hasHandles Inherited Method hasHandles(groupKey){Boolean} Inherited from Accessor

Returns true if a named group of handles exist.

Parameter

groupKey *

optional

A group key.

Returns

Type	Description
Boolean	Returns `true` if a named group of handles exist.

Example

// Remove a named group of handles if they exist.
if (obj.hasHandles("watch-view-updates")) {
  obj.removeHandles("watch-view-updates");
}

intersection Method intersection(timeExtent){TimeExtent}inner

Returns the time extent resulting from the intersection of a given time extent and parsed time extent. Returns a timeExtent with undefined values for start and end properties if the two time extents do not intersect.

Parameter

timeExtent TimeExtent

The time extent to be intersected with the time extent on which intersection() is being called on.

Returns

Type	Description
TimeExtent	The intersecting time extent between two time extents.

Example

// get the intersecting timeExtent between view.timeExtent and
// layer view filter's timeExtent
const timeExtent = view.timeExtent.intersection(layerView.effect.filter.timeExtent);
if (timeExtent){
  console.log("time intersection", timeExtent);
  const query = layerView.createQuery();
  query.timeExtent = timeExtent;
  layerView.queryFeatures(query).then(function(results){
    console.log(results.features.length, " are returned for intersecting timeExtent");
  });
}

removeHandles Inherited Method removeHandles(groupKey) Inherited from Accessor

Removes a group of handles owned by the object.

Parameter

groupKey *

optional

A group key or an array or collection of group keys to remove.

Example

obj.removeHandles(); // removes handles from default group

obj.removeHandles("handle-group");
obj.removeHandles("other-handle-group");

toJSON Method toJSON(){Object}

Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() guide topic for more information.

Returns

Type	Description
Object	The ArcGIS portal JSON representation of an instance of this class.

union Method union(timeExtent){TimeExtent}inner

Returns the time extent resulting from the union of the current time extent and a given time extent.

Parameter

timeExtent TimeExtent

The time extent to be unioned with.

Returns

Type	Description
TimeExtent	The resulting union of the current time extent and the given time extent.

Example

// Return the union of two time extents. One from 1990 to 2000 and the second from 2010 to 2020.
const decade1 = new TimeExtent({
  start: new Date(1990, 0, 1),
  end: new Date(2000, 0, 1)
});
const decade2 = new TimeExtent({
  start: new Date(2010, 0, 1),
  end: new Date(2020, 0, 1)
});
const union = decade1.union(decade2);
console.log(`The unioned extent starts from year ${union.start.getFullYear()} to ${union.end.getFullYear()}`);
// output: "The unioned extent starts from year 1990 to 2020"