FieldElement

// Create the field element
const fieldElement1 = new FieldElement({
  fieldName: "inspector",
  label: "Inspector name"
});

const fieldElement2 = new FieldElement({
  fieldName: "inspdate",
  label: "Inspection date",
  description: "Date inspection was handled",
  input: { // autocastable to DateTimePickerInput
    type: "datetime-picker",
      includeTime: true,
      min: 1547678342000,
      max: 1610836742000
    }
});

const fieldElement3 = new FieldElement({
  fieldName: "placename",
  label: "Business name",
  editable: false
});

const fieldElement4 = new FieldElement({
  fieldName: "floodinsur",
  label: "Flood insurance",
  input: { // autocastable to RadioButtonsInput
    type: "radio-buttons",
    noValueOptionLabel: "No value",
    showNoValueOption: true
  }
});

// Next pass in any elements to the FormTemplate
const formTemplate = new FormTemplate({
  title: "Inspector report",
  description: "Enter all relevant information below",
  elements: [fieldElement1, fieldElement2, fieldElement3, fieldElement4] // Add all elements to the template
});

Property Overview

Property Details

declaredClass Stringreadonly inherited

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

description String inherited

The element's description providing the purpose behind it.

domain CodedValueDomain|RangeDomainautocast

The coded value domain or range domain of the field.

editable Boolean

Deprecated since version 4.26. Use editableExpression instead. Assigning editableExpression values of "true" and "false" will have the same effect as assigning true and false to editable.

A Boolean determining whether users can edit this form element. If not supplied, the editable state is derived from the editable property of referenced field in the service. If there is a set editableExpression, it will take precedence over this property.

This does not change the underlying service's field and whether it can be edited.

Default Value:true

editableExpression String

Since: ArcGIS Maps SDK for JavaScript 4.23

A reference to the name of an Arcade expression defined in the expressionInfos of the FormTemplate. The expression must follow the specification defined in the Form Constraint Profile. Expressions may reference field values using the $feature global input and must return either true or false.

When this expression evaluates to true, it is possible to edit the field value, and vice-versa if false. If the referenced field on the feature service is not editable, the editable expression is ignored and the element is not editable.

The referenced expression must be defined in the form template's expressionInfos. It cannot be set inline within the element object.

See also

• Form Constraint Arcade Profile

fieldName String

The field name as defined by the feature layer. Set this property to indicate which field to edit.

hint String

Contains a hint used to help editors while editing fields. Set this as a temporary placeholder for text/number inputs in either TextAreaInput or TextBoxInput.

input TextBoxInput|TextAreaInput|DateTimePickerInput|BarcodeScannerInput|ComboBoxInput|RadioButtonsInput|SwitchInputautocast

The input to use for the element. The client application is responsible for defining the default user interface.

label String inherited

A string value containing the field alias. This is not to Arcade expressions as the title is used instead.

requiredExpression String

A reference to the name of an Arcade expression defined in the expressionInfos of the FormTemplate. The expression must follow the specification defined in the Form Constraint Profile. Expressions may reference field values using the $feature global input and must return either true or false.

When this expression evaluates to true and the field value is required, the element must have a valid value in order for the feature to be created or edited. When the expression evaluates to false, the element is not required. If no expression is provided, the required behavior is defined via the required property.

If the referenced field is non-nullable, the requiredExpression is ignored and the element is always required.

The referenced expression must be defined in the form template's expressionInfos. It cannot be set inline within the element object.

See also

• Form Constraint Arcade Profile

type Stringreadonly

Indicates the type of form element. FieldElement is of type, field.

For FieldElement the type is always "field".

Example

// Create an array of elements. If the element is autocasted, the type property must be set.
elements: [{
  // autocastable as FieldElement
  type: "field",
  fieldName: "lastname",
  label: "Last name"
 },
 {
  type: "field",
  fieldName: "firstname",
  label: "First name"
 }]

valueExpression String

Since: ArcGIS Maps SDK for JavaScript 4.23

A reference to the name of an Arcade expression defined in the expressionInfos of the FormTemplate. The expression must follow the specification defined in the Form Calculation Profile. This expression references field values within an individual feature or in other layers and must return either a date, number, or string value.

Once the expression evaluates, the form's field value updates to the expressions' result.

It is required to set the view property when instantiating a FeatureForm widget and using expressions that use the $map variable.

The referenced expression must be defined in the form template's expressionInfos. It cannot be set inline within the element object.

See also

• Sample - Editing with calculated field expressions

• Form Calculation Arcade Profile

visibilityExpression String inherited

A reference to the name of an Arcade expression defined in the expressionInfos of the FormTemplate. The expression must follow the specification defined by the Form Constraint Profile. Expressions may reference field values using the $feature profile variable and must return either true or false.

When this expression evaluates to true, the element is displayed. When the expression evaluates to false the element is not displayed. If no expression is provided, the element is always displayed. Care must be taken when defining a visibility expression for a non-nullable field i.e. to make sure that such fields either have default values or are made visible to users so that they can provide a value before submitting the form.

The referenced expression must be defined in the form template's expressionInfos. It cannot be set inline within the element object.

See also

• ExpressionInfo

• Sample - Update Feature Attributes

• Form Constraint Arcade Profile

Example

// Expression created within ExpressionInfos and is referenced in element
const expression = new ExpressionInfo({
  name: "alwaysHidden",
  expression: "false"
});

// Reference an already-defined visibilityExpression set within the ExpressionInfos
const fieldElement = new FieldElement({
  type: "field",
  fieldName: "inspemail",
  label: "Email address",
  visibilityExpression: "alwaysHidden"
});

formTemplate.expressionInfos = [ expression ];
formTemplate.elements = [ fieldElement ];

Method Overview

Method Details

addHandles(handleOrHandles, groupKey)inherited

Since: ArcGIS Maps SDK 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 }
);

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(){FieldElement}

Creates a deep clone of the FieldElement class.

Returns

Type	Description
FieldElement	A deep clone of the FieldElement instance.

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(groupKey){Boolean}inherited

Since: ArcGIS Maps SDK 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");
}

removeHandles(groupKey)inherited

Since: ArcGIS Maps SDK 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");

toJSON(){Object}inherited

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.