TextElement | API Reference | ArcGIS Maps SDK for JavaScript 4.30

A TextElement form element is used to define descriptive text as an element within a layer or FeatureForm FormTemplate and can be used to aid those entering or updating information. The text may reference values returned from a field attribute or an Arcade expression defined in a FormTemplate's expressionInfos property.

See also

Example

// Create a plain-text element.
const textElement = new TextElement({
  text: "Tree species: {COMMONNAME}."
});

// Create a markdown text element with italics and bold text.
const markdownTextElement = new TextElement({
  textFormat: "markdown",
  text: "_This text is italicized_ & **This text is bold.**"
});

layer.formTemplate = new FormTemplate({
  title: "Plain-text and markdown text elements",
  elements: [ textElement, markdownTextElement ]
});

Constructors

TextElement Constructor new TextElement(properties)

Parameter

properties Object

optional

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

Property Overview

Any properties can be set, retrieved or listened to. See the Working with Properties topic.

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Type	Summary	Class
String	The name of the class.	Accessor
String	The formatted string content to display.	TextElement
String	Defines the format of the `text` property.	TextElement
String	Indicates the type of form element.	TextElement
String	A reference to the name of an Arcade expression defined in the expressionInfos of the FormTemplate.	Element

Property Details

declaredClass Inherited Property declaredClass Stringreadonly Inherited from Accessor

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

text Property text String

The formatted string content to display. This may contain a field name enclosed in {} (e.g. {FIELDNAME}), or an Arcade expression name (e.g. {expression/EXPRESSIONNAME}). Text content may also leverage Markdown formatting for these features:

Bold
Bullet lists
Headings
Italic
Links
Numbered lists
Quoting code
Strikethrough

Example

// This TextElement uses the markdown large heading.
const textElement = new TextElement({
  textFormat: "markdown",
  text: "##### This tree type is {COMMONNAME}."
});

textFormat Property textFormat String

Defines the format of the text property.

Possible Values:"plain-text" |"markdown"

Default Value:plain-text

type Property type Stringreadonly

Indicates the type of form element. This will always be "text";

For TextElement the type is always "text".

visibilityExpression Inherited Property visibilityExpression String Inherited from Element

A reference to the name of an Arcade expression defined in the expressionInfos of the FormTemplate.

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 as to make certain the specified field has either 1) a default value, or 2) is made visible to the end user to enter a value before submitting the form.

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.
The referenced expression must be defined in the form template's expressionInfos. It cannot be set inline within the element object.
Field and Group elements must be visible if the field or one of the grouped fields is required.

See also

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

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Return Type	Summary	Class
	Adds one or more handles which are to be tied to the lifecycle of the object.	Accessor
TextElement	Creates a deep clone of the TextElement class.	TextElement
*	Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product.	Element
Boolean	Returns true if a named group of handles exist.	Accessor
	Removes a group of handles owned by the object.	Accessor
Object	Converts an instance of this class to its ArcGIS portal JSON representation.	Element

Method Details

addHandles Inherited Method addHandles(handleOrHandles, groupKey) Inherited from Accessor

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 Method clone(){TextElement}

Creates a deep clone of the TextElement class.

Returns

Type	Description
TextElement	A deep clone of the TextElement instance.

fromJSON Inherited Method 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 Inherited Method hasHandles(groupKey){Boolean} Inherited from Accessor

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 Inherited Method removeHandles(groupKey) Inherited from Accessor

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 Inherited Method toJSON(){Object} Inherited from Element

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.