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Showing content from https://developers.arcgis.com/javascript/latest/api-reference/esri-support-timeUtils.html below:

timeUtils | API Reference | ArcGIS Maps SDK for JavaScript 4.33

ESM: import * as timeUtils from "@arcgis/core/support/timeUtils.js";

CDN: const timeUtils = await $arcgis.import("@arcgis/core/support/timeUtils.js");

Object: @arcgis/core/support/timeUtils

Since: ArcGIS Maps SDK for JavaScript 4.21

Provides utility methods for working with dates.

getTimeExtentFromLayers Method getTimeExtentFromLayers(layers, signal){Promise<TimeExtent>}

Returns the time extent of all layers which are "feature based" time-aware and/or have a "layer based" time-aware with Layer.visibilityTimeExtent set. If the time extent of the layers is set, the method returns the union of the time extents of all layers. If the time extent of a layer is not set, the method returns TimeExtent with start and end set to null. For FeatureLayer or MapImageLayer with hasLiveData set to true, the method fetches the time extent from the server.

Returns

Examples

// Get the time extent of all layers in the view.
const fullTimeExtent = await getTimeExtentFromLayers(view.map.allLayers);

// Get the time extent from an array of layers.
const timeExtent = await getTimeExtentFromLayers([
  earthquakes,
  emergencyCalls
]);

getTimeSliderSettingsFromWebDocument Method getTimeSliderSettingsFromWebDocument(document, signal){Promise<Object>}

Since: ArcGIS Maps SDK for JavaScript 4.30 timeUtils since 4.21, getTimeSliderSettingsFromWebDocument added at 4.30.

Extracts time slider settings from a WebMap or WebScene if the document contains a time slider widget definition. Returns an object with properties that can be used to configure the TimeSlider or TimeSliderViewModel. If a document does not contain a time slider definition then null is returned.

Parameters

An instance of a webmap or webscene to extract time slider settings from.

optional

Signal object that can be used to abort the asynchronous task.

Returns

Type Description Promise<Object> When resolved, returns an object with the following properties. Property Type Description fullTimeExtent TimeExtent The temporal extent of the entire slider. loop Boolean When true, the time slider will play its animation in a loop. mode "instant" | "time-window" | "cumulative-from-start" | "cumulative-from-end" The time slider mode. playRate Number The time (in milliseconds) between animation steps. stops StopsByDates | StopsByCount | StopsByInterval Defines specific locations on the time slider where thumbs will snap to when manipulated. timeExtent TimeExtent The current time extent of the time slider.

Example

// Import and apply time slider settings stored in a webmap.
const map = new WebMap({
  portalItem: {
    id: "your-webmap-id",
  }
});

timeUtils.getTimeSliderSettingsFromWebDocument(map).then((timeSliderSettings) => {
  const timeSlider = new TimeSlider({
    ...timeSliderSettings,
    view
  });
});

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