TimeSliderViewModel

// Add a TimeSlider widget to the top left corner of the view.
const timeSlider = new TimeSlider({
  container: "timeSliderDiv",
  viewModel: {
    view: view,
    mode: "instant",
    fullTimeExtent: {
      start: new Date(2000, 0, 1),
      end: new Date(2010, 0, 1)
    },
    timeExtent: {
      start: new Date(2000, 0, 1),
      end: new Date(2000, 0, 1)
    }
  }
});
view.ui.add(timeSlider, "top-left");

Property Overview

Property Details

actions Collection<action>autocast

Autocasts from Object[]

Since: ArcGIS API for JavaScript 4.21

Defines actions that will appear in a menu when the user clicks the ellipsis button in the widget. The ellipsis button will not display if this property is null or if the collection is empty. Each action is defined with a unique id, a title, and an icon.

The trigger-action event fires each time an action in the menu is clicked. This event can be used to execute custom code such as setting the timeExtent to a specific date or copying the timeExtent to the browser's clipboard.

Example:

// Create a TimeSlider with two actions to snap the thumb to two specfic time extents.
const timeSlider = new TimeSlider({
  container: "timeSliderDiv",
  viewModel: {
    fullTimeExtent: {
      start: new Date(2011, 0, 1),
      end: new Date(2012, 0, 1)
    },
    mode: "instant",
    actions: [
      {
        id: "quake",
        icon: "exclamation-mark-triangle",
        title: "Jump to Earthquake"
      },
      {
        id: "quake-plus-one-month",
        icon: "organization",
        title: "One month later"
      }
    ]
  }
});
timeSlider1.on("trigger-action", (event) => {
  const quake = new Date(Date.UTC(2011, 3, 11, 8, 16, 12));
  const oneMonthLater = new Date(quake.getTime()).setMonth(quake.getMonth() + 1);
  switch(event.action.id) {
    case "quake":
      timeSlider1.timeExtent = {
        start: quake,
        end: quake
      };
      break;
    case "quake-plus-one-month":
      timeSlider1.timeExtent = {
        start: oneMonthLater,
        end: oneMonthLater
      };
      break;
  }
});

declaredClass Stringreadonly inherited

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

effectiveStops Date[]readonly

Defined specific locations on the timeline that the handles will snap to when manipulated.

Default Value:null

Example:

// Add yearly stops starting from the beginning of 2001.
let timeSlider = new TimeSlider({
  container: "timeSliderDiv",
  viewModel: {
    fullTimeExtent: {
      start: new Date(2000, 5, 1),
      end: new Date(2010, 0, 1)
    },
    stops: {
      interval: {
        value: 1,
        unit: "years"
      }
    },
   timeExtent: {
     start: new Date(2001, 0, 1),
     end: new Date(2010, 0, 1)
   }
  }
});
timeSlider.viewModel.effectiveStops.forEach((stop) => {
  console.log(stop);
});

fullTimeExtent TimeExtentautocast

The temporal extent of the entire slider. It defines the entire time period within which you can visualize your time aware data using the time slider widget.

Example:

// Create a new TimeSlider
let timeSlider = new TimeSlider({
  container: "timeSliderDiv",
  viewModel: {
    view: view
  }
});

// wait for the time-aware layer to load
layer.when(() => {
  // set up time slider properties based on layer timeInfo
  timeSlider.fullTimeExtent = layer.timeInfo.fullTimeExtent;
  timeSlider.stops = {
    interval: layer.timeInfo.interval
    timeExtent: timeSlider.fullTimeExtent
  };
});

loop Boolean

If animating, the time indicator(s) will restart if they reach the edge.

Default Value:false

Example:

// Start a time slider animation that advances every second and restarts when it reaches the end.
let timeSlider = new TimeSlider({
  container: "timeSliderDiv",
  viewModel: {
    loop: true,
    playRate: 1000
  }
});
timeSlider.viewModel.play();

mode String

The time slider mode. This property is used for defining if the temporal data will be displayed cumulatively up to a point in time, a single instant in time, or within a time range. See the following table for possible values.

Possible Values	Description	Example
instant	The slider will show temporal data that falls on a single instance in time. Set the timeExtent property's start and end dates to same date: {start: sameDate, end: sameDate}
time-window	The slider will show temporal data that falls within a given time range. This is the default. Set timeExtent property's start and date properties to desired dates.
cumulative-from-start	Similar to time-window with the start time is always pinned to the start of the slider. Set the timeExtent property's start date to null and set end date to a desired date: {start: null, end: date}
cumulative-from-end	Also, similar to the time-window with the end time pinned to the end of the slider. Set the timeExtent property's start date to a desired date and set end date to null: {start: date, end: null}

Possible Values:"instant"|"time-window"|"cumulative-from-start"|"cumulative-from-end"

Default Value:time-window

Example:

// Create a single thumbed time slider that includes all historic content.
let timeSlider = new TimeSlider({
  container: "timeSliderDiv",
  viewModel: {
    view: view,
    mode: "cumulative-from-start",
    fullTimeExtent: {
      start: new Date(2000, 0, 1),
      end: new Date(2010, 0, 1)
    },
    timeExtent: {
      start: null,
      end: new Date(2001, 0, 1)
    }
  }
});

playRate Number

The time (in milliseconds) between animation steps.

When a View is associated with a TimeSlider and the TimeSlider is playing, the playback will pause before advancing if the View is still updating. For example, if the playRate is set to 1,000 (one second) and the View takes 1.5 seconds to render then the TimeSlider thumb(s) will advance every 1.5 seconds rather than every second.

Default Value:1000

Example:

// Start a time slider animation that advances
// ten times a second and stops when it reaches the end.
timeSlider.set({
  loop: false,
  playRate: 100
});
timeSlider.play();

state Stringreadonly

The view model's state.

Value	Description
disabled	Widget is not ready yet.
ready	Ready for time navigation.
playing	Time is playing in the navigator.

Possible Values:"disabled"|"ready"|"playing"

Default Value:disabled

Example:

// Display the current state of the view model.
switch (timeSlider.viewModel.state) {
  case "disabled":
    console.log("The view is not ready or some property are not set.");
    break;
  case "ready":
    console.log("The time slider is ready for use.");
    break;
  case "playing":
    console.log("The time slider is currently animating.");
    break;
}

stops StopsByDates|StopsByCount|StopsByIntervalautocast

Autocasts from Object

Defines specific locations on the time slider where thumbs will snap to when manipulated. If unspecified, ten evenly spaced stops will be added.

For continuous sliding set stops to null.

timeSlider.viewModel.stops = null;

To define regularly spaced stops, parse an object with interval and timeExtent properties with types TimeInterval and TimeExtent respectively. The timeExtent property is optional and used to confine stops to a certain date range. This property is useful to commence stops on a specific day or the week or month. If a stop definition by interval results in excess of 10,000 stops then the view model will default to ten evenly spaced stops.

// Add yearly intervals starting from the beginning of the TimeSlider.
timeSlider.viewModel.stops = {
  interval: {
    value: 1,
    unit: "years"
  }
};

Rather than regular time intervals the TimeSlider can be divided into evenly spaced stops. As with the previous method, divisions can be confined to a specific date range using the optional timeExtent property.

// Add stops at 15 evenly spaced intervals.
timeSlider.viewModel.stops = {
  count: 15
};

For irregular spaced stops simply assign an array of dates as demonstrated below.

// Add nine irregular stops.
timeSlider.viewModel.stops = {
  dates: [
    new Date(2000, 0, 1), new Date(2001, 3, 8), new Date(2002, 0, 10),
    new Date(2003, 12, 8), new Date(2004, 2, 19), new Date(2005, 7, 5),
    new Date(2006, 9, 11), new Date(2007, 11, 21), new Date(2008, 1, 10)
  ]
};

Lastly, to constrain or offset division by count or interval use the optional timeExtent property.

// Add yearly stops from Christmas 2019 to Christmas 2029 only
timeSlider.viewModel.stops = {
  interval: {
    value: 1,
    unit: "years"
  },
  timeExtent: {
    start: new Date(2019, 11, 25),
    end: new Date(2029, 11, 25)
  }
};

// Likewise, add stops that represent quarters of 2019 only.
timeSlider.viewModel.stops = {
  count: 4,
  timeExtent: {
    start: new Date(2019, 0, 1),
    end: new Date(2020, 0, 1)
  }
};

Default Value:{ count : 10 }

timeExtent TimeExtent

The current time extent of the time slider. This property can be watched for updates and used to update the time extent property in queries and/or the layer filters and effects. The following table shows the timeExtent values returned for each mode.

Mode	The timeExtent value
time-window	{start: startDate, end: endDate}
instant	{start: sameDate, end: sameDate}
cumulative-from-start	{start: null, end: endDate}
cumulative-from-end	{start: startDate, end: null}

Default Value:null

Example:

// Display the time extent to the console whenever it changes.
const timeSlider = new TimeSlider({
  container: "timeSliderDiv",
  mode: "time-window",
  fullTimeExtent: {
    start: new Date(2019, 2, 3),
    end: new Date(2019, 2, 5)
  },
  timeExtent: {
    start: new Date(2019, 2, 1),
    end: new Date(2019, 2, 28)
  }
});
timeSlider.watch("timeExtent", (timeExtent) => {
  console.log("Time extent now starts at", timeExtent.start, "and finishes at:", timeExtent.end);
});

view MapView|SceneView

A reference to the MapView or SceneView. If this property is set, the TimeSlider widget will update the view's timeExtent property whenever the time slider is manipulated or updated programmatically. This property will affect any time-aware layer in the view.

Example:

// Create and then add a TimeSlider widget and then listen to changes in the View's time extent.
const timeSlider = new TimeSlider({
  container: "timeSliderDiv",
  viewModel: {
    view: view,
    mode: "instant",
    fullTimeExtent: {
      start: new Date(2000, 0, 1),
      end: new Date(2010, 0, 1)
    },
    timeExtent: {
      start: null,
      end: new Date(2000, 0, 1)
    }
  }
});
view.ui.add(timeSlider, "top-left");

view.watch("timeExtent", (timeExtent) => {
  console.log("New view time is: " + timeExtent.start);
});

Method Overview

Method Details

getPropertiesFromWebMap(webMap, signal){Promise<Object>}static

Since: ArcGIS API for JavaScript 4.22

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

Parameters:

webMap WebMap An instance of a webmap to extract time slider settings from.

signal AbortSignal 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.

See also:

• Sample - Time-enabled bookmarks

Example:

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

TimeSliderViewModel.getPropertiesFromWebMap(map).then((timeSliderSettings) => {
  const timeSliderViewModel = new TimeSliderViewModel({
    ...timeSliderSettings,
    view
  });
});

next()

Incrementally moves the time extent forward one stop

Example:

// Advance the slider's time extent.
const timeSlider = new TimeSlider({
  container: "timeSliderDiv",
  viewModel: {
    mode: "instant",
    fullTimeExtent: {
      start: new Date(2000, 0, 1),
      end: new Date(2010, 0, 1)
    },
    timeExtent: {
      start: new Date(2000, 0, 1),
      end: new Date(2000, 0, 1)
    }
  }
});
timeSlider.viewModel.next();

play()

Initiates the time slider's temporal playback.

Example:

// Start a TimeSlider animation if not already playing.
if (timeSlider.viewModel.state === "ready") {
  timeSlider.viewModel.play();
}

previous()

Incrementally moves the time extent back one stop.

Example:

timeSlider.viewModel.previous();

stop()

Stops the time slider's temporal playback.

Example:

// Stop the current TimeSlider animation.
if (timeSlider.viewModel.state === "playing") {
  timeSlider.viewModel.stop();
}

updateWebDocument(webmap)

Since: ArcGIS API for JavaScript 4.18

Updates the time slider widget definition in the provided WebMap.

Parameter:

webmap WebMap The webmap to be updated.

Example:

// Load a webmap containing a timeslider widget into a MapView. Once loaded, advance the current time
// extent by one stop and then update the original webmap.

const webmap = new WebMap({
  portalItem: {
    id: "acea555a4b6f412dae98994bcfdbc002"
  }
});

const view = new MapView({
  container: "viewDiv",
  map: webmap
});
await view.when();

const timeSlider = new TimeSlider({
  view
});
// Advance to thumb to next time extent
timeSlider.next();
timeSlider.updateWebDocument(webmap);
webmap.save();

Type Definitions

action Object

Definition of an action that can be assigned to the actions property on the TimeSlider or the TimeSliderViewModel. It is displayed in a menu when the user clicks the ellipsis button on the TimeSlider widget.

Properties:

icon String The name of the icon to display. The value of this property must match the icon name from Calcite UI Icons.

id String Unique identifier of the action.

title String The title of the action that will be displayed in the menu.

Event Overview

{action: action}

Event Details

trigger-action

Since: ArcGIS API for JavaScript 4.21

Fires when a user clicks on an action in the actions menu.

Property:

action action The action that was clicked.

See also:

• TimeSlider.actions

Example:

// Add an action to reset the time extent to the full time extent.
timeSlider.actions.add({
  id: "full-extent",
  icon: "content-full",
  title: "Full Extent"
});
timeSlider.on("trigger-action", (event) => {
  if (event.action.id === "full-extent") {
    timeSlider.timeExtent = timeSlider.fullTimeExtent;
  }
});