FeatureTemplates

AMD: require(["esri/widgets/FeatureTemplates"], (FeatureTemplates) => { /* code goes here */ });
ESM: import FeatureTemplates from "@arcgis/core/widgets/FeatureTemplates";
Class: esri/widgets/FeatureTemplates
Inheritance: FeatureTemplates Widget Accessor
Since: ArcGIS API 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.

featureTemplates

For information about gaining full control of widget styles, see the Styling topic.
See also
Example
const templates = new FeatureTemplates({
  container: "templatesDiv",
  layers: layers
});

Constructors

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

Property Overview

Any properties can be set, retrieved or listened to. See the Working with Properties topic.
Show inherited properties Hide inherited properties
Name Type Summary Class
String|HTMLElement

The ID or node representing the DOM element containing the widget.

more details
Widget
String

The name of the class.

more details
Accessor

Specifies whether or not the list should be forced to scroll within its containing element

more details
enableListScroll
FilterFunction

Function can be defined to help filter template items within the widget.

more details
FeatureTemplates
String

Text used to filter items.

more details
FeatureTemplates
String|GroupByFunction

It is possible to group template items.

more details
FeatureTemplates
Number

Indicates the heading level to use for the labels of grouped feature templates.

more details
FeatureTemplates
String

The unique ID assigned to the widget when the widget is created.

more details
Widget
String

The widget's default label.

more details
FeatureTemplates
FeatureLayer[]

An array of Featurelayers to display within the widget.

more details
FeatureTemplates
FeatureTemplatesViewModel

The view model for this widget.

more details
FeatureTemplates
Boolean

Indicates whether the widget is visible.

more details
Widget
VisibleElements

The visible elements that are displayed within the widget.

more details
FeatureTemplates

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 cases 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 Stringreadonly inherited

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

enableListScroll inner

Specifies whether or not the list should be forced to scroll within its containing element

filterFunction FilterFunction

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.

featureTemplatesFilterFunction

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 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.

Type Description Example
layer This is the default grouping. Groups template items by layers. featureTemplatesGroupByLayer
geometry Groups template items by geometry type. FeatureTemplatesGroupByGeometry
none The widget displays everything in one list with no grouping. featureTemplatesGroupByLayer
GroupByFunction Custom function that takes an object containing a FeatureTemplate and FeatureLayer. FeatureTemplatesGroupByCustomGroupFunction
Default Value:layer
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 Number
Since: ArcGIS API for JavaScript 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.

Default Value:4
See also
Example
// Group label will render as an <h3>
featureTemplates.headingLevel = 3;

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.

label String

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
});

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 Boolean inherited

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".

Default Value:true
Example
// Hides the widget in the view
widget.visible = false;
visibleElements VisibleElements
Since: ArcGIS API for JavaScript 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.

featureTemplatesFilter

Example
featureTemplates.visibleElements = {
   filter: false
};

Method Overview

Show inherited methods Hide inherited methods
Name Return Type Summary Class

Adds one or more handles which are to be tied to the lifecycle of the object.

more details
Accessor
String

A utility method used for building the value for a widget's class property.

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Widget

Destroys the widget instance.

more details
Widget
Boolean

Returns true if a named group of handles exist.

more details
Accessor
Boolean

isFulfilled() may be used to verify if creating an instance of the class is fulfilled (either resolved or rejected).

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Widget
Boolean

isRejected() may be used to verify if creating an instance of the class is rejected.

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Widget
Boolean

isResolved() may be used to verify if creating an instance of the class is resolved.

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Widget
Object

Registers an event handler on the instance.

more details
Widget

Adds one or more handles which are to be tied to the lifecycle of the widget.

more details
Widget

This method is primarily used by developers when implementing custom widgets.

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Widget

Removes a group of handles owned by the object.

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Accessor
Object

This method is primarily used by developers when implementing custom widgets.

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Widget

Renders widget to the DOM immediately.

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Widget

This method is primarily used by developers when implementing custom widgets.

more details
Widget
Promise

when() may be leveraged once an instance of the class is created.

more details
Widget

Method Details

addHandles(handleOrHandles, groupKey)inherited
Since: ArcGIS API for JavaScript 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 }
);

// Handle gets removed when the object is destroyed.
this.addHandles(handle);
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.

classes(classNames){String}inherited

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

Parameter
classNames String|String[]|Object
repeatable

The class names.

Returns
Type Description
String The computed class name.
See also
Example
// .tsx syntax showing how to set CSS classes while rendering the widget

render() {
  const dynamicIconClasses = {
    [CSS.myIcon]: this.showIcon,
    [CSS.greyIcon]: !this.showIcon
  };

  return (
    <div class={classes(CSS.root, CSS.mixin, dynamicIconClasses)} />
  );
}
destroy()inherited

Destroys the widget instance.

hasHandles(groupKey){Boolean}inherited
Since: ArcGIS API for JavaScript 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(){Boolean}inherited
Since: ArcGIS API for JavaScript 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(){Boolean}inherited
Since: ArcGIS API for JavaScript 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(){Boolean}inherited
Since: ArcGIS API for JavaScript 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(type, listener){Object}inherited

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

Parameters

An event or an array of events to listen for.

listener Function

The function to call when the event fires.

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);
});
own(handleOrHandles)inherited
Since: ArcGIS API for JavaScript 4.24

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

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

this.own(handle); // Handle gets removed when the widget is destroyed.
Parameter
handleOrHandles WatchHandle|WatchHandle[]

Handles marked for removal once the widget is destroyed.

postInitialize()inherited

This method is primarily used by developers when implementing custom widgets. Executes after widget is ready for rendering.

removeHandles(groupKey)inherited
Since: ArcGIS API for JavaScript 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(){Object}inherited

This method is primarily used by developers when implementing custom widgets. It must be implemented by subclasses for rendering.

Returns
Type Description
Object The rendered virtual node.
renderNow()inherited

Renders widget to the DOM immediately.

scheduleRender()inherited

This method is primarily used by developers when implementing custom widgets. Schedules widget rendering. This method is useful for changes affecting the UI.

when(callback, errback){Promise}inherited
Since: ArcGIS API for JavaScript 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
callback Function
optional

The function to call when the promise resolves.

errback Function
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(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
filterName Object

An object containing a name property.

Specification
name String

The name of the template item to filter.

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(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
grouping Object

An object containing the properties referenced below.

Specification
layer FeatureLayer

FeatureLayer instance referenced in layers property.

template FeatureTemplate

FeatureTemplate associated with the layer.

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

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
filter Boolean
optional

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

Event Overview

Name Type Summary Class
{item: TemplateItem,template: FeatureTemplate}

Fires when a template item is selected.

more details
FeatureTemplates

Event Details

select

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

Properties

The selected template item.

template FeatureTemplate

The feature template associated with the template item.

See also
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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