LabelExpressionInfo

Since

ArcGIS Maps SDK for JavaScript 4.7

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

An Arcade expression following the specification defined by the Arcade Labeling Profile. Expressions in labels may reference field values using the $feature profile variable and must return a string.

For example, to label a layer of cities with their names, simply reference the field value with the global variable: $feature.CITY_NAME. Expressions can be more sophisticated and use logical functions. This may be useful if you want to use classed labels. For example, the following expression appends city to the end of the label if the feature's population field contains a number greater than 10,000. Otherwise, town is appended to the end of the label. Additionally, you can use TextFormatting.NewLine to add a new line to the label.

IIF($feature.POPULATION > 10000, $feature.NAME + ' city', $feature.NAME + ' town')

The title of the label expression. This is particularly useful in the case of multiple label classes.

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.

Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() guide topic for more information.