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FeatureTemplates | API Reference | ArcGIS Maps SDK for JavaScript 4.33

ESM: import FeatureTemplates from "@arcgis/core/widgets/FeatureTemplates.js";

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

Class: @arcgis/core/widgets/FeatureTemplates

Since: ArcGIS Maps SDK for JavaScript 4.10

The FeatureTemplates widget is part of the overall editing workflow. Its main purpose is to display templates from one or more feature layers. In addition to displaying feature layer templates, it is also possible to filter and group templates for an easier editing experience. The widget listens for an end user to select a specific template in the widget. Its select event is fired and the resulting template information is returned. This widget can be used in conjunction with FeatureLayer.applyEdits to enable an end user to update one of its feature layers.

See also

Example

const templates = new FeatureTemplates({
  container: "templatesDiv",
  layers: layers
});

Constructors

FeatureTemplates Constructor new FeatureTemplates(properties)

Parameter

optional

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

Example

// Typical usage
const templates = new FeatureTemplates({
  container: "templatesDiv",
  layers: layers
});

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

Show inherited properties Hide inherited properties

Property Details

The ID or node representing the DOM element containing the widget. This property can only be set once. The following examples are all valid use case when working with widgets.

Examples

// Create the HTML div element programmatically at runtime and set to the widget's container
const basemapGallery = new BasemapGallery({
  view: view,
  container: document.createElement("div")
});

// Add the widget to the top-right corner of the view
view.ui.add(basemapGallery, {
  position: "top-right"
});

// Specify an already-defined HTML div element in the widget's container

const basemapGallery = new BasemapGallery({
  view: view,
  container: basemapGalleryDiv
});

// Add the widget to the top-right corner of the view
view.ui.add(basemapGallery, {
  position: "top-right"
});

// HTML markup
<body>
  <div id="viewDiv"></div>
  <div id="basemapGalleryDiv"></div>
</body>

// Specify the widget while adding to the view's UI
const basemapGallery = new BasemapGallery({
  view: view
});

// Add the widget to the top-right corner of the view
view.ui.add(basemapGallery, {
  position: "top-right"
});

declaredClass Inherited Property declaredClass Stringreadonly: The name of the class. The declared class name is formatted as esri.folder.className.

Since: ArcGIS Maps SDK for JavaScript 4.28 FeatureTemplates since 4.10, disabled added at 4.28.: Used to disable the widget user interface. This does not prevent the widget or view model from functioning programmatically. Methods invoked programmatically still work as expected.

enableListScroll Property enableListScroll Boolean Since: ArcGIS Maps SDK for JavaScript 4.28 FeatureTemplates since 4.10, enableListScroll added at 4.28.: Indicates whether the list of available feature template items should scroll within its containing element.

Function can be defined to help filter template items within the widget. A custom function can be used to aid when searching for templates. It takes a function which passes in an object containing a name property of the template item.

Example

// Filter and display templates only if their labels contain the word `Street`
function myFilterFunction(filter) {
  let containsName = filter.label.includes("Street");
  return containsName;
}

// Create the FeatureTemplates widget
templates = new FeatureTemplates({
  container: "templatesDiv",
  visibleElements: {
    filter: false, // disable the default filter UI
  },
  layers: [featureLayer], // in this example, one layer is used
  filterFunction: myFilterFunction
});

filterText Property filterText String: Text used to filter items.

It is possible to group template items. This can aid in managing various template items and how they display within the widget. The values are discussed below.

Example

// This example shows using a function to check if
// the layer title contains the word 'military'. If so,
// return a group of items called "All Military Templates"
function customGroup(grouping) {
  // Consolidate all military layers
  if (grouping.layer.title.toLowerCase().indexOf("military") > -1) {
    return "All Military Templates"
  }
// Otherwise, group by layer title
  return grouping.layer.title;
}

// Create the FeatureTemplates widget
templates = new FeatureTemplates({
  container: "templatesDiv",
  layers: layers,
  groupBy: customGroup
});

headingLevel Property headingLevel Number Since: ArcGIS Maps SDK for JavaScript 4.20 FeatureTemplates since 4.10, headingLevel added at 4.20.

Indicates the heading level to use for the labels of grouped feature templates. By default, the group label is rendered as a level 4 heading (e.g. <h4>Group label</h4>). Depending on the widget's placement in your app, you may need to adjust this heading for proper semantics. This is important for meeting accessibility standards.

Example

// Group label will render as an <h3>
featureTemplates.headingLevel = 3;

Since: ArcGIS Maps SDK for JavaScript 4.27 FeatureTemplates since 4.10, icon added at 4.27.: Icon displayed in the widget's button.

id Inherited Property id String: The unique ID assigned to the widget when the widget is created. If not set by the developer, it will default to the container ID, or if that is not present then it will be automatically generated.

: The widget's default label.

An array of FeatureLayers to display within the widget. The order in which these layers are set in the array dictates how they display within the widget.

The widget is designed to only display layers that are enabled for editing. It will not display layers that are enabled to only edit attributes.

Example

// The layers to display within the widget
let militaryUnits = new FeatureLayer({
  url: "http://sampleserver6.arcgisonline.com/arcgis/rest/services/Military/FeatureServer/2"
});

let militaryHostile = new FeatureLayer({
  url: "http://sampleserver6.arcgisonline.com/arcgis/rest/services/Military/FeatureServer/6"
});

let layers = [militaryUnits, militaryHostile];

// Create FeatureTemplates widget
templates = new FeatureTemplates({
  container: "templatesDiv",
  layers: layers
});

Since: ArcGIS Maps SDK for JavaScript 4.28 FeatureTemplates since 4.10, selectionMode added at 4.28.

Specifies the selection behavior of list items. The "single" selection mode keeps the clicked list item selected. Whereas, "none" does not preserve the selection after clicking the list item.

Possible Values:"single" |"none"

: The view model for this widget. This is a class that contains all the logic (properties and methods) that controls this widget's behavior. See the FeatureTemplatesViewModel class to access all properties and methods on the widget.

visible Inherited Property visible Boolean

Indicates whether the widget is visible.

If false, the widget will no longer be rendered in the web document. This may affect the layout of other elements or widgets in the document. For example, if this widget is the first of three widgets associated to the upper right hand corner of the view UI, then the other widgets will reposition when this widget is made invisible. For more information, refer to the css display value of "none".

Example

// Hides the widget in the view
widget.visible = false;

Since: ArcGIS Maps SDK for JavaScript 4.15 FeatureTemplates since 4.10, visibleElements added at 4.15.

The visible elements that are displayed within the widget. This property provides the ability to turn individual elements of the widget's display on/off.

Example

featureTemplates.visibleElements = {
   filter: false
};

Method Overview

Show inherited methods Hide inherited methods

Method Details

addHandles Inherited Method addHandles(handleOrHandles, groupKey) Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, addHandles added at 4.25.

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

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.

classes Inherited Method classes(classNames){String}

A utility method used for building the value for a widget's class property. This aids in simplifying css class setup.

Returns

Type Description String The computed class name.

Example

// .tsx syntax showing how to set css classes while rendering the widget

render() {
  const dynamicClasses = {
    [css.flip]: this.flip,
    [css.primary]: this.primary
  };

  return (
    <div class={classes(css.root, css.mixin, dynamicClasses)} />
  );
}

destroy Inherited Method destroy(): Destroys the widget instance.

hasHandles Inherited Method hasHandles(groupKey){Boolean} Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, hasHandles added at 4.25.

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");
}

isFulfilled Inherited Method isFulfilled(){Boolean} Since: ArcGIS Maps SDK for JavaScript 4.19 Widget since 4.2, isFulfilled added at 4.19.

isFulfilled() may be used to verify if creating an instance of the class is fulfilled (either resolved or rejected). If it is fulfilled, true will be returned.

Returns

Type Description Boolean Indicates whether creating an instance of the class has been fulfilled (either resolved or rejected).

isRejected Inherited Method isRejected(){Boolean} Since: ArcGIS Maps SDK for JavaScript 4.19 Widget since 4.2, isRejected added at 4.19.

isRejected() may be used to verify if creating an instance of the class is rejected. If it is rejected, true will be returned.

Returns

Type Description Boolean Indicates whether creating an instance of the class has been rejected.

isResolved Inherited Method isResolved(){Boolean} Since: ArcGIS Maps SDK for JavaScript 4.19 Widget since 4.2, isResolved added at 4.19.

isResolved() may be used to verify if creating an instance of the class is resolved. If it is resolved, true will be returned.

Returns

Type Description Boolean Indicates whether creating an instance of the class has been resolved.

on Inherited Method on(type, listener){Object}

Registers an event handler on the instance. Call this method to hook an event with a listener.

Returns

Type Description Object Returns an event handler with a remove() method that should be called to stop listening for the event(s). Property Type Description remove Function When called, removes the listener from the event.

Example

view.on("click", function(event){
  // event is the event handle returned after the event fires.
  console.log(event.mapPoint);
});

postInitialize Inherited Method postInitialize(): Executes after widget is ready for rendering.

removeHandles Inherited Method removeHandles(groupKey) Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, removeHandles added at 4.25.

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");

render Inherited Method render(){Object}

This method is implemented by subclasses for rendering.

Returns

Type Description Object The rendered virtual node.

renderNow Inherited Method renderNow(): Renders widget to the DOM immediately.

scheduleRender Inherited Method scheduleRender(): Schedules widget rendering. This method is useful for changes affecting the UI.

when Inherited Method when(callback, errback){Promise} Since: ArcGIS Maps SDK for JavaScript 4.19 Widget since 4.2, when added at 4.19.

when() may be leveraged once an instance of the class is created. This method takes two input parameters: a callback function and an errback function. The callback executes when the instance of the class loads. The errback executes if the instance of the class fails to load.

Parameters

optional

The function to call when the promise resolves.

optional

The function to execute when the promise fails.

Returns

Type Description Promise Returns a new Promise for the result of callback.

Example

// Although this example uses the BasemapGallery widget, any class instance that is a promise may use when() in the same way
let bmGallery = new BasemapGallery();
bmGallery.when(function(){
  // This function will execute once the promise is resolved
}, function(error){
  // This function will execute if the promise is rejected due to an error
});

Type Definitions

FilterFunction Type Definition FilterFunction(filterName){Boolean}

The filter used when setting the filterFunction property. It takes an object containing a name property of the template item and returns whether or not to include it.

Parameters

An object containing a name property.

Returns

Type Description Boolean Function is a predicate, to test each element of the array. Return true to keep item in the template widget, otherwise, false to remove it.

Example

// Filter and display templates only if their labels contain the word `Street`
function myFilterFunction(filter) {
  let containsName = filter.label.includes("Street");
  return containsName;
}

// Create the FeatureTemplates widget
templates = new FeatureTemplates({
  container: "templatesDiv",
  visibleElements: {
    filter: false, // disable the default filter UI
  }
  layers: [featureLayer], // in this example, one layer is used
  filterFunction: myFilterFunction
});

GroupByFunction Type Definition GroupByFunction(grouping){String |Object}

The function used when setting the groupBy property. It is used to customize the grouping of template items. This can aid in managing various template items and how they display within the widget. This takes an object containing a template and a layer property.

Parameters

Specification

An object containing the properties referenced below.

Returns

Type Description String | Object Groups consist of a group key and label. These are shown in the UI. If both the key and label are identical, return a string. Otherwise, return an object with key/name properties. This gives finer control of the groups.

Examples

// This example shows using a function to check if
// the layer title contains the word 'military'. If so,
// return a group of items called "All Military Templates"
function customGroup(grouping) {
  // Consolidate all military layers
  if (grouping.layer.title.toLowerCase().indexOf("military") > -1) {
    return "All Military Templates"
  }
// Otherwise, group by layer title
  return grouping.layer.title;
}

// Create the FeatureTemplates widget
templates = new FeatureTemplates({
  container: "templatesDiv",
  layers: layers,
  groupBy: customGroup
});

// Group template items by layers.
// This function is as same as setting
// the groupBy property to "layer" option.
function groupByLayer (grouping) {
  const group = {
    key: grouping.layer,
    name: grouping.layer.title
  };
  return group;
}

// Create the FeatureTemplates widget
const templates = new FeatureTemplates({
  container: "templatesDiv",
  layers: layers,
  groupBy: groupByLayer
});

VisibleElements Type Definition VisibleElements

The visible elements that are displayed within the widget. This provides the ability to turn individual elements of the widget's display on/off.

Property: optional
Indicates whether to the filter will be displayed. Default is true.

Event Overview Event Details

Fires when a template item is selected. This occurs when the associated view model's select method is called.

Example

// Listen for when a template item is selected
templates.on("select", function(evtTemplate) {
  // Access the selected template item's attributes
  attributes = evtTemplate.template.prototype.attributes;

  // Create a new feature with the selected template at cursor location
  const handler = view.on("click", function(event) {
    handler.remove(); // remove click event handler.
    event.stopPropagation(); // Stop click event propagation

    if (event.mapPoint) {
      // Create a new feature with the selected template item.
      editFeature = new Graphic({
        geometry: event.mapPoint,
          attributes: {
            "IncidentType": attributes.IncidentType
          }
      });

      // Setup the applyEdits parameter with adds.
      const edits = {
        addFeatures: [editFeature]
      };
      featureLayer.applyEdits(params).then(function(editsResult) {
        if (editsResult.addFeatureResults.length > 0) {
          console.log("Created a new feature.")
        }
      });
    }
  });
});

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